Security advisory

{
  "id": "7f21ada73bd7f1927c278258a7faf03134eb74eb9418397e54a7472c77f2508a",
  "url": "https://osv.dev/vulnerability/CVE-2026-114731",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-114731",
    "summary": "Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action). The fetched stylesheet was read into memory in full, with no size limit and no read timeout, so a stylesheet URL referencing an attacker-controlled host could be used to exhaust server memory. Upstream fixed this in the commit “Add a size limit to the CSS proxy content processing”, which caps the response at 5 MB, reads it as a stream and applies a read timeout.",
    "evidence": "osv:CVE-2026-114731",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-114731",
      "aliases": [
        "CVE-2026-114731"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/roundcube/roundcubemail",
              "type": "GIT",
              "events": [
                {
                  "introduced": "993b888afe29c383bf45c84f17090f4db96367ba"
                },
                {
                  "fixed": "1dd910522e73318447ed6e20bed1efd7adeb240a"
                },
                {
                  "introduced": "df9effa186f81d676962b941da4ebab5e05c3088"
                },
                {
                  "fixed": "26d1b077f0c910a16c44c1862fe26e15f0bb3685"
                },
                {
                  "fixed": "2c9f6da692fa37cad2aaf85d5b127b583d22b264"
                },
                {
                  "fixed": "99a5bdd05b01f45493cc0da4c96968eac7668126"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.6.0"
                      },
                      {
                        "fixed": "1.6.20"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.7.0"
                      },
                      {
                        "fixed": "1.7.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2c9f6da692fa37cad2aaf85d5b127b583d22b264"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "26d1b077f0c910a16c44c1862fe26e15f0bb3685"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "1.7.5"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1dd910522e73318447ed6e20bed1efd7adeb240a"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "1.6.20"
                  },
                  {
                    "range": [
                      {
                        "fixed": "99a5bdd05b01f45493cc0da4c96968eac7668126"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.7.4",
            "1.6.19",
            "1.7.3",
            "1.6.18",
            "1.6.17",
            "1.7.2",
            "1.6.16",
            "1.7.1",
            "1.7.0",
            "1.6.15",
            "1.6.14",
            "1.6.13",
            "1.6.12",
            "1.6.11",
            "1.6.10",
            "1.6.9",
            "1.6.8",
            "1.6.7",
            "1.6.6",
            "1.6.5",
            "1.6.4",
            "1.6.3",
            "1.6.2",
            "1.6.1",
            "1.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-114731.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.960137225Z",
      "provider": "osv",
      "references": [
        "https://github.com/roundcube/roundcubemail/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114731.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-114731",
        "https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5",
        "https://bugs.debian.org/1151279",
        "https://github.com/roundcube/roundcubemail/commit/2c9f6da692fa37cad2aaf85d5b127b583d22b264",
        "https://github.com/roundcube/roundcubemail/commit/99a5bdd05b01f45493cc0da4c96968eac7668126",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.6.20",
        "https://github.com/roundcube/roundcubemail/releases/tag/1.7.5"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114731.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-114731",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496873,
  "published_at": "2026-10-22T02:12:34.577+00:00"
}