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roundcube — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-35543

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.

Products
roundcube
Affected versions
1.1.1+dfsg.1-2, 1.1.2+dfsg.1-5, 1.1.3+dfsg.1-1, 1.1.4+dfsg.1-1, 1.2~beta+dfsg.1-0ubuntu1, 1.2~beta+dfsg.1-0ubuntu1+esm1, 1.2~beta+dfsg.1-0ubuntu1+esm2, 1.2~beta+dfsg.1-0ubuntu1+esm3, 1.2~beta+dfsg.1-0ubuntu1+esm4, 1.2~beta+dfsg.1-0ubuntu1+esm5, 1.2~beta+dfsg.1-0ubuntu1+esm6, 1.2~beta+dfsg.1-0ubuntu1+esm7, 1.2~beta+dfsg.1-0ubuntu1+esm8, 1.3.0+dfsg.1-1, 1.3.1+dfsg.1-1, 1.3.10+dfsg.1-1, 1.3.3+dfsg.1-1, 1.3.3+dfsg.1-2, 1.3.6+dfsg.1-1, 1.3.6+dfsg.1-1ubuntu0.1~esm1, 1.3.6+dfsg.1-1ubuntu0.1~esm2, 1.3.6+dfsg.1-1ubuntu0.1~esm3, 1.3.6+dfsg.1-1ubuntu0.1~esm4, 1.3.6+dfsg.1-1ubuntu0.1~esm5, 1.3.6+dfsg.1-1ubuntu0.1~esm6, 1.3.6+dfsg.1-1ubuntu0.1~esm7, 1.3.6+dfsg.1-1ubuntu0.1~esm8, 1.3.8+dfsg.1-2, 1.4.1+dfsg.1-2, 1.4.11+dfsg.1-4, 1.4.2+dfsg.1-1, 1.4.2+dfsg.1-2, 1.4.3+dfsg.1-1, 1.4.3+dfsg.1-1ubuntu0.1~esm1, 1.4.3+dfsg.1-1ubuntu0.1~esm2, 1.4.3+dfsg.1-1ubuntu0.1~esm3, 1.4.3+dfsg.1-1ubuntu0.1~esm4, 1.4.3+dfsg.1-1ubuntu0.1~esm5, 1.4.3+dfsg.1-1ubuntu0.1~esm6, 1.4.3+dfsg.1-1ubuntu0.1~esm7, 1.4.3+dfsg.1-1ubuntu0.1~esm8, 1.5.0+dfsg.1-2, 1.5.0+dfsg.1-2ubuntu0.1~esm1, 1.5.0+dfsg.1-2ubuntu0.1~esm2, 1.5.0+dfsg.1-2ubuntu0.1~esm3, 1.5.0+dfsg.1-2ubuntu0.1~esm4, 1.5.0+dfsg.1-2ubuntu0.1~esm5, 1.5.0+dfsg.1-2ubuntu0.1~esm6, 1.6.10+dfsg-1, 1.6.10+dfsg-2, 1.6.11+dfsg-1, 1.6.11+dfsg-1ubuntu0.26.04.1~esm1, 1.6.2+dfsg-1, 1.6.4+dfsg-1, 1.6.5+dfsg-1, 1.6.6+dfsg-1, 1.6.6+dfsg-2, 1.6.6+dfsg-2ubuntu0.1, 1.6.6+dfsg-2ubuntu0.1+esm1, 1.6.6+dfsg-2ubuntu0.1+esm2, 1.6.6+dfsg-2ubuntu0.1+esm3
Fixed versions
Not specified
CVEs
CVE-2026-35543
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 03:02 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-35543

core-osv · Original source

Published 3 Apr 2026, 05:16 UTC

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.

osv:UBUNTU-CVE-2026-35543

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

roundcube

Fixed versions: Not specified

Complete source record
{
  "id": "9286244b3c906bdb87883ae4d7d9b3c9e3e01bc3e55bf8d8a47c092787ebf1f9",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-35543",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-35543",
    "summary": "An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.",
    "evidence": "osv:UBUNTU-CVE-2026-35543",
    "products": [
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.1.1+dfsg.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.2+dfsg.1-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.3+dfsg.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.1.4+dfsg.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm6",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm7",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "1.2~beta+dfsg.1-0ubuntu1+esm8",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.3.0+dfsg.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.1+dfsg.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.3+dfsg.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.3+dfsg.1-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm4",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm6",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm7",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "1.3.6+dfsg.1-1ubuntu0.1~esm8",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.3.8+dfsg.1-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.3.10+dfsg.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.1+dfsg.1-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.2+dfsg.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.2+dfsg.1-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm3",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm4",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm5",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm6",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm7",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "1.4.3+dfsg.1-1ubuntu0.1~esm8",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.4.11+dfsg.1-4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2ubuntu0.1~esm1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2ubuntu0.1~esm2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2ubuntu0.1~esm3",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2ubuntu0.1~esm4",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2ubuntu0.1~esm5",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "1.5.0+dfsg.1-2ubuntu0.1~esm6",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.6.2+dfsg-1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.4+dfsg-1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.5+dfsg-1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.6+dfsg-1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.6+dfsg-2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.6+dfsg-2ubuntu0.1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.6+dfsg-2ubuntu0.1+esm1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.6+dfsg-2ubuntu0.1+esm2",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "1.6.6+dfsg-2ubuntu0.1+esm3",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.6.10+dfsg-1",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.6.10+dfsg-2",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "1.6.11+dfsg-1",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.6.11+dfsg-1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "roundcube",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "1.6.11+dfsg-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "1.6.11+dfsg-1ubuntu0.26.04.1~esm1",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-35543",
      "aliases": [
        "UBUNTU-CVE-2026-35543"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "roundcube",
            "purl": "pkg:deb/ubuntu/roundcube?arch=source&distro=esm-apps%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
          "versions": [
            "1.1.1+dfsg.1-2",
            "1.1.2+dfsg.1-5",
            "1.1.3+dfsg.1-1",
            "1.1.4+dfsg.1-1",
            "1.2~beta+dfsg.1-0ubuntu1",
            "1.2~beta+dfsg.1-0ubuntu1+esm1",
            "1.2~beta+dfsg.1-0ubuntu1+esm2",
            "1.2~beta+dfsg.1-0ubuntu1+esm3",
            "1.2~beta+dfsg.1-0ubuntu1+esm4",
            "1.2~beta+dfsg.1-0ubuntu1+esm5",
            "1.2~beta+dfsg.1-0ubuntu1+esm6",
            "1.2~beta+dfsg.1-0ubuntu1+esm7",
            "1.2~beta+dfsg.1-0ubuntu1+esm8"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35543.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "roundcube",
                "binary_version": "1.2~beta+dfsg.1-0ubuntu1+esm8"
              },
              {
                "binary_name": "roundcube-core",
                "binary_version": "1.2~beta+dfsg.1-0ubuntu1+esm8"
              },
              {
                "binary_name": "roundcube-mysql",
                "binary_version": "1.2~beta+dfsg.1-0ubuntu1+esm8"
              },
              {
                "binary_name": "roundcube-pgsql",
                "binary_version": "1.2~beta+dfsg.1-0ubuntu1+esm8"
              },
              {
                "binary_name": "roundcube-plugins",
                "binary_version": "1.2~beta+dfsg.1-0ubuntu1+esm8"
              },
              {
                "binary_name": "roundcube-sqlite3",
                "binary_version": "1.2~beta+dfsg.1-0ubuntu1+esm8"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "roundcube",
            "purl": "pkg:deb/ubuntu/roundcube?arch=source&distro=esm-apps%2Fbionic",
            "ecosystem": "Ubuntu:Pro:18.04:LTS"
          },
          "versions": [
            "1.3.0+dfsg.1-1",
            "1.3.1+dfsg.1-1",
            "1.3.3+dfsg.1-1",
            "1.3.3+dfsg.1-2",
            "1.3.6+dfsg.1-1",
            "1.3.6+dfsg.1-1ubuntu0.1~esm1",
            "1.3.6+dfsg.1-1ubuntu0.1~esm2",
            "1.3.6+dfsg.1-1ubuntu0.1~esm3",
            "1.3.6+dfsg.1-1ubuntu0.1~esm4",
            "1.3.6+dfsg.1-1ubuntu0.1~esm5",
            "1.3.6+dfsg.1-1ubuntu0.1~esm6",
            "1.3.6+dfsg.1-1ubuntu0.1~esm7",
            "1.3.6+dfsg.1-1ubuntu0.1~esm8"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35543.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "roundcube",
                "binary_version": "1.3.6+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-core",
                "binary_version": "1.3.6+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-mysql",
                "binary_version": "1.3.6+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-pgsql",
                "binary_version": "1.3.6+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-plugins",
                "binary_version": "1.3.6+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-sqlite3",
                "binary_version": "1.3.6+dfsg.1-1ubuntu0.1~esm8"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "roundcube",
            "purl": "pkg:deb/ubuntu/roundcube?arch=source&distro=esm-apps%2Ffocal",
            "ecosystem": "Ubuntu:Pro:20.04:LTS"
          },
          "versions": [
            "1.3.8+dfsg.1-2",
            "1.3.10+dfsg.1-1",
            "1.4.1+dfsg.1-2",
            "1.4.2+dfsg.1-1",
            "1.4.2+dfsg.1-2",
            "1.4.3+dfsg.1-1",
            "1.4.3+dfsg.1-1ubuntu0.1~esm1",
            "1.4.3+dfsg.1-1ubuntu0.1~esm2",
            "1.4.3+dfsg.1-1ubuntu0.1~esm3",
            "1.4.3+dfsg.1-1ubuntu0.1~esm4",
            "1.4.3+dfsg.1-1ubuntu0.1~esm5",
            "1.4.3+dfsg.1-1ubuntu0.1~esm6",
            "1.4.3+dfsg.1-1ubuntu0.1~esm7",
            "1.4.3+dfsg.1-1ubuntu0.1~esm8"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35543.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "roundcube",
                "binary_version": "1.4.3+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-core",
                "binary_version": "1.4.3+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-mysql",
                "binary_version": "1.4.3+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-pgsql",
                "binary_version": "1.4.3+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-plugins",
                "binary_version": "1.4.3+dfsg.1-1ubuntu0.1~esm8"
              },
              {
                "binary_name": "roundcube-sqlite3",
                "binary_version": "1.4.3+dfsg.1-1ubuntu0.1~esm8"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "roundcube",
            "purl": "pkg:deb/ubuntu/roundcube?arch=source&distro=esm-apps%2Fjammy",
            "ecosystem": "Ubuntu:Pro:22.04:LTS"
          },
          "versions": [
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      ],
      "modified": "2026-10-17T13:00:03.630053845Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-35543"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-35543",
        "https://www.cve.org/CVERecord?id=CVE-2026-35543",
        "https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14",
        "https://nullcathedral.com/posts/2026-03-18-roundcube-round-two-three-more-sanitizer-bypasses/#smil-animations-values-and-by",
        "https://github.com/roundcube/roundcubemail/commit/1a63e01542bff42aaa71c00c4c279a09ef31f20c",
        "https://github.com/roundcube/roundcubemail/commit/39471343ee081ce1d31696c456a2c163462daae3",
        "https://github.com/roundcube/roundcubemail/commit/82ab5eca7b332fce7a174b2b987f0957a66377cd",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.5.14",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.6.14",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-35543",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 360216,
  "published_at": "2026-04-03T05:16:00+00:00"
}