mattermost-11.9 — security advisory

{
  "id": "3a999bfd3c87cab59e9e6e23559dd4bee8924ccc9d3c0c27175021dbbb804002",
  "url": "https://osv.dev/vulnerability/CGA-gwcw-8pqg-xcw4",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CGA-gwcw-8pqg-xcw4",
    "summary": "CGA-gwcw-8pqg-xcw4",
    "evidence": "osv:CGA-gwcw-8pqg-xcw4",
    "products": [
      {
        "name": {
          "value": "mattermost-11.9",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "11.9.2-r3",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CGA-gwcw-8pqg-xcw4",
      "aliases": [
        "CGA-gwcw-8pqg-xcw4"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "11.9.2-r3"
                }
              ]
            }
          ],
          "package": {
            "name": "mattermost-11.9",
            "purl": "pkg:apk/chainguard/mattermost-11.9?arch=aarch64",
            "ecosystem": "Chainguard"
          },
          "database_specific": {
            "source": "https://advisories.cgr.dev/chainguard/v3/osv/CGA-gwcw-8pqg-xcw4.json"
          },
          "ecosystem_specific": {
            "components": [
              {
                "component_name": "golang.org/x/net",
                "component_purl": "pkg:golang/golang.org/x/net@v0.58.0",
                "component_type": "go-module",
                "component_version": "v0.58.0",
                "component_location": "/usr/bin/mattermost",
                "latest_event_status": "fixed",
                "latest_event_timestamp": "2026-10-13T15:23:09Z"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-13T18:46:44.517206238Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-78659",
        "GO-2026-6603"
      ],
      "references": []
    },
    "related_cves": [
      {
        "value": "CVE-2026-78659",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 312835,
  "published_at": "2026-10-09T06:33:07+00:00"
}