libxml2-2.9.1 — security advisory

{
  "id": "00b5a9f15c94defac27503500e096e0f14c0471d81b30548beca8e32dfb7772c",
  "url": "https://osv.dev/vulnerability/ECHO-ba64-c94d-5407",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-ba64-c94d-5407",
    "summary": "ECHO-ba64-c94d-5407",
    "evidence": "osv:ECHO-ba64-c94d-5407",
    "products": [
      {
        "name": {
          "value": "libxml2-2.9.1",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.1+e1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-ba64-c94d-5407",
      "aliases": [
        "ECHO-ba64-c94d-5407"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.1+e1"
                }
              ]
            }
          ],
          "package": {
            "name": "libxml2-2.9.1",
            "purl": "pkg:deb/echo/libxml2-2.9.1",
            "ecosystem": "Echo"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-ba64-c94d-5407.json"
          }
        }
      ],
      "modified": "2026-10-21T12:45:09.650073915Z",
      "provider": "osv",
      "upstream": [
        "CVE-2021-3537"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2021-3537",
        "https://nvd.nist.gov/vuln/detail/CVE-2021-3537",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1956522",
        "https://lists.debian.org/debian-lts-announce/2021/05/msg00008.html",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BZOMV5J4PMZAORVT64BKLV6YIZAFDGX6/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QVM4UJ3376I6ZVOYMHBNX4GY3NIV52WV/",
        "https://security.gentoo.org/glsa/202107-05",
        "https://security.netapp.com/advisory/ntap-20210625-0002/",
        "https://www.oracle.com/security-alerts/cpuapr2022.html",
        "https://www.oracle.com/security-alerts/cpujul2022.html",
        "https://www.oracle.com/security-alerts/cpuoct2021.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2021-3537",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 393139,
  "published_at": "2026-10-21T12:17:34.263+00:00"
}