UnratedFix available

DEBIAN-CVE-2026-49825

Type: advisorySource: OSV1 source record

lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link attributes in ``lxml.html.defs.link_attrs`` were missing ``xlink:href``, which can be used for URL bypass attacks in embedded SVG/MathML/etc. content. This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5.

Announced 20 Aug 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-49825

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-49825

lxml

Source reference: /affected/0/package/name

Affected versions: 4.9.2-1
Source reference: /affected/0/versions
Fixed versions: 4.9.2-1+deb12u1
Source reference: /affected/0/ranges
Prerequisites: Not stated in this record

lxml

Source reference: /affected/1/package/name

Affected versions: 5.4.0-1
Source reference: /affected/1/versions
6.0.1-1
Source reference: /affected/1/versions
6.0.2-1
Source reference: /affected/1/versions
6.1.0-1
Source reference: /affected/1/versions
6.1.3-1
Source reference: /affected/1/versions
7.0.0~a2-1
Source reference: /affected/1/versions
7.0.0~b1-1
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

lxml

Source reference: /affected/2/package/name

Affected versions: 5.4.0-1
Source reference: /affected/2/versions
6.0.1-1
Source reference: /affected/2/versions
6.0.2-1
Source reference: /affected/2/versions
6.1.0-1
Source reference: /affected/2/versions
Fixed versions: 6.1.3-1
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

lxml-html-clean

Source reference: /affected/3/package/name

Affected versions: 0.4.2-1
Source reference: /affected/3/versions
0.4.3-1
Source reference: /affected/3/versions
0.4.4-1
Source reference: /affected/3/versions
0.4.4-1~deb13u1
Source reference: /affected/3/versions
0.4.5-1
Source reference: /affected/3/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

lxml-html-clean

Source reference: /affected/4/package/name

Affected versions: 0.4.2-1
Source reference: /affected/4/versions
0.4.3-1
Source reference: /affected/4/versions
0.4.4-1
Source reference: /affected/4/versions
0.4.4-1~deb13u1
Source reference: /affected/4/versions
Fixed versions: 0.4.5-1
Source reference: /affected/4/ranges
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "4.9.2-1+deb12u1"
          }
        ]
      }
    ],
    "package": {
      "name": "lxml",
      "purl": "pkg:deb/debian/lxml?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "4.9.2-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49825.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "lxml",
      "purl": "pkg:deb/debian/lxml?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "5.4.0-1",
      "6.0.1-1",
      "6.0.2-1",
      "6.1.0-1",
      "6.1.3-1",
      "7.0.0~a2-1",
      "7.0.0~b1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49825.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "6.1.3-1"
          }
        ]
      }
    ],
    "package": {
      "name": "lxml",
      "purl": "pkg:deb/debian/lxml?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "5.4.0-1",
      "6.0.1-1",
      "6.0.2-1",
      "6.1.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49825.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "lxml-html-clean",
      "purl": "pkg:deb/debian/lxml-html-clean?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "0.4.2-1",
      "0.4.3-1",
      "0.4.4-1",
      "0.4.4-1~deb13u1",
      "0.4.5-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49825.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "0.4.5-1"
          }
        ]
      }
    ],
    "package": {
      "name": "lxml-html-clean",
      "purl": "pkg:deb/debian/lxml-html-clean?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "0.4.2-1",
      "0.4.3-1",
      "0.4.4-1",
      "0.4.4-1~deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-49825.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57222 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:05:21 GMT
Publisher date: Thu, 20 Aug 2026 15:17:30 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-49825 · Revision 1Source updated