UnratedFix available

webkit2gtk3: Fix of 16 CVEs

Type: advisorySources: OSV

- CVE-2026-28907: align ContentSecurityPolicySource::pathMatches() with the CSP3 path-matching algorithm to prevent path-traversal CSP bypass (WebKit bug 308675) - CVE-2026-43660: preserve all CSP policies when a blob: URL inherits from a page that sent multiple CSP headers (WebKit bug 308906) - CVE-2026-28958: pass the initiator when computing SameSite info in FrameLoader::load to prevent SameSite=Strict cookie cross-site leakage (WebKit bug 311228)

Products: webkit2gtk3, webkit2gtk3-devel, webkit2gtk3-jsc, webkit2gtk3-jsc-devel
Affected versions: Not specified
Fixed versions: 2.50.6-1.el9_6.tuxcare.els4
CVEs: CVE-2026-28907, CVE-2026-28958, CVE-2026-43660
Confirmed fixed CVEs: Not specified
Updated in this feed: 1 Nov 2026, 11:47 UTC · Revision 1

Source evidence

webkit2gtk3: Fix of 16 CVEs

core-osv · Original source

Published 23 Jun 2026, 12:14 UTC

osv:CLSA-2026-1782216821

webkit2gtk3

Fixed versions: 2.50.6-1.el9_6.tuxcare.els4

webkit2gtk3-devel

Fixed versions: 2.50.6-1.el9_6.tuxcare.els4

webkit2gtk3-jsc

Fixed versions: 2.50.6-1.el9_6.tuxcare.els4

webkit2gtk3-jsc-devel

Fixed versions: 2.50.6-1.el9_6.tuxcare.els4

Complete source record

{
  "id": "7fb5aefb39bd169dabcdf696085d0b678e521d87104306ab4673b5459dc3f3e4",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1782216821",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "webkit2gtk3: Fix of 16 CVEs",
    "summary": "- CVE-2026-28907: align ContentSecurityPolicySource::pathMatches() with the CSP3 path-matching algorithm to prevent path-traversal CSP bypass (WebKit bug 308675) - CVE-2026-43660: preserve all CSP policies when a blob: URL inherits from a page that sent multiple CSP headers (WebKit bug 308906) - CVE-2026-28958: pass the initiator when computing SameSite info in FrameLoader::load to prevent SameSite=Strict cookie cross-site leakage (WebKit bug 311228)",
    "evidence": "osv:CLSA-2026-1782216821",
    "products": [
      {
        "name": {
          "value": "webkit2gtk3",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.50.6-1.el9_6.tuxcare.els4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "webkit2gtk3-devel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.50.6-1.el9_6.tuxcare.els4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "webkit2gtk3-jsc",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.50.6-1.el9_6.tuxcare.els4",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "webkit2gtk3-jsc-devel",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.50.6-1.el9_6.tuxcare.els4",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1782216821",
      "aliases": [
        "CLSA-2026-1782216821"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.50.6-1.el9_6.tuxcare.els4"
                }
              ]
            }
          ],
          "package": {
            "name": "webkit2gtk3",
            "purl": "pkg:rpm/tuxcare/webkit2gtk3?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1782216821.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.50.6-1.el9_6.tuxcare.els4"
                }
              ]
            }
          ],
          "package": {
            "name": "webkit2gtk3-devel",
            "purl": "pkg:rpm/tuxcare/webkit2gtk3-devel?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1782216821.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.50.6-1.el9_6.tuxcare.els4"
                }
              ]
            }
          ],
          "package": {
            "name": "webkit2gtk3-jsc",
            "purl": "pkg:rpm/tuxcare/webkit2gtk3-jsc?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1782216821.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.50.6-1.el9_6.tuxcare.els4"
                }
              ]
            }
          ],
          "package": {
            "name": "webkit2gtk3-jsc-devel",
            "purl": "pkg:rpm/tuxcare/webkit2gtk3-jsc-devel?distro=almalinux-9.6",
            "ecosystem": "TuxCare:AlmaLinux:9.6"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1782216821.json"
          }
        }
      ],
      "modified": "2026-10-26T09:43:20.056872229Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-28907",
        "CVE-2026-28958",
        "CVE-2026-43660"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1782216821.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28847",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28883",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28901",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28902",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28903",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28904",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28905",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28907",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28942",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28946",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28947",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28953",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28955",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28958",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43658",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43660"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-28907",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-28958",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-43660",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 449843,
  "published_at": "2026-06-23T12:14:16+00:00"
}