osbuild-composer: Fix of CVE-2026-42502

{
  "id": "3b568a73656febd3031988a2ae3f69bd08d7a1aa225d1cb7e10de827b117dea8",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1789657645",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "osbuild-composer: Fix of CVE-2026-42502",
    "summary": "- CVE-2026-42502: treat foster-parented raw-text elements in foreign content as escaped rather than literal in childTextNodesAreLiteral of the vendored golang.org/x/net/html, preventing a cross-site scripting bypass when a parsed tree is re-rendered",
    "evidence": "osv:CLSA-2026-1789657645",
    "products": [
      {
        "name": {
          "value": "osbuild-composer",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "132.2-3.el9_6.alma.1.tuxcare.els9",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "osbuild-composer-core",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "132.2-3.el9_6.alma.1.tuxcare.els9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "osbuild-composer-tests",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "132.2-3.el9_6.alma.1.tuxcare.els9",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "osbuild-composer-worker",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "132.2-3.el9_6.alma.1.tuxcare.els9",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1789657645",
      "aliases": [
        "CLSA-2026-1789657645"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "132.2-3.el9_6.alma.1.tuxcare.els9"
                }
              ]
            }
          ],
          "package": {
            "name": "osbuild-composer",
            "purl": "pkg:rpm/tuxcare/osbuild-composer?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-2026-1789657645.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "132.2-3.el9_6.alma.1.tuxcare.els9"
                }
              ]
            }
          ],
          "package": {
            "name": "osbuild-composer-core",
            "purl": "pkg:rpm/tuxcare/osbuild-composer-core?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-2026-1789657645.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "132.2-3.el9_6.alma.1.tuxcare.els9"
                }
              ]
            }
          ],
          "package": {
            "name": "osbuild-composer-tests",
            "purl": "pkg:rpm/tuxcare/osbuild-composer-tests?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-2026-1789657645.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "132.2-3.el9_6.alma.1.tuxcare.els9"
                }
              ]
            }
          ],
          "package": {
            "name": "osbuild-composer-worker",
            "purl": "pkg:rpm/tuxcare/osbuild-composer-worker?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-2026-1789657645.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:35.738913371Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-42502"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789657645.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42502"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-42502",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 447795,
  "published_at": "2026-09-17T15:07:38+00:00"
}