UnratedFix available

DEBIAN-CVE-2026-11940

Type: advisorySource: OSV1 source record

tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330.

Announced 23 Jun 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-11940

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-2026-11940

pypy3

Source reference: /affected/0/package/name

Affected versions: 7.3.19+dfsg-2
Source reference: /affected/0/versions
7.3.20+dfsg-1
Source reference: /affected/0/versions
7.3.20+dfsg-2
Source reference: /affected/0/versions
7.3.20+dfsg-3
Source reference: /affected/0/versions
7.3.20+dfsg-4
Source reference: /affected/0/versions
7.3.21+dfsg-1
Source reference: /affected/0/versions
7.3.21+dfsg-2
Source reference: /affected/0/versions
7.3.21+dfsg-3
Source reference: /affected/0/versions
7.3.21+dfsg-4
Source reference: /affected/0/versions
7.3.22+dfsg-1
Source reference: /affected/0/versions
7.3.23+dfsg-1
Source reference: /affected/0/versions
7.3.23+dfsg-2
Source reference: /affected/0/versions
8.0.0+dfsg-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

pypy3

Source reference: /affected/1/package/name

Affected versions: 7.3.19+dfsg-2
Source reference: /affected/1/versions
7.3.20+dfsg-1
Source reference: /affected/1/versions
7.3.20+dfsg-2
Source reference: /affected/1/versions
7.3.20+dfsg-3
Source reference: /affected/1/versions
7.3.20+dfsg-4
Source reference: /affected/1/versions
7.3.21+dfsg-1
Source reference: /affected/1/versions
7.3.21+dfsg-2
Source reference: /affected/1/versions
7.3.21+dfsg-3
Source reference: /affected/1/versions
7.3.21+dfsg-4
Source reference: /affected/1/versions
7.3.22+dfsg-1
Source reference: /affected/1/versions
7.3.23+dfsg-1
Source reference: /affected/1/versions
7.3.23+dfsg-2
Source reference: /affected/1/versions
Fixed versions: 8.0.0+dfsg-1
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

python3.11

Source reference: /affected/2/package/name

Affected versions: 3.11.2-6
Source reference: /affected/2/versions
3.11.2-6+deb12u1
Source reference: /affected/2/versions
3.11.2-6+deb12u2
Source reference: /affected/2/versions
3.11.2-6+deb12u3
Source reference: /affected/2/versions
3.11.2-6+deb12u4
Source reference: /affected/2/versions
3.11.2-6+deb12u5
Source reference: /affected/2/versions
3.11.2-6+deb12u6
Source reference: /affected/2/versions
3.11.2-6+deb12u7
Source reference: /affected/2/versions
3.11.2-6+deb12u8
Source reference: /affected/2/versions
3.11.3-1
Source reference: /affected/2/versions
3.11.3-2
Source reference: /affected/2/versions
3.11.4-1
Source reference: /affected/2/versions
3.11.5-1
Source reference: /affected/2/versions
3.11.5-2
Source reference: /affected/2/versions
3.11.5-3
Source reference: /affected/2/versions
3.11.6-1
Source reference: /affected/2/versions
3.11.6-2
Source reference: /affected/2/versions
3.11.6-3
Source reference: /affected/2/versions
3.11.6-3~hurd.2
Source reference: /affected/2/versions
3.11.7-1
Source reference: /affected/2/versions
3.11.7-2
Source reference: /affected/2/versions
3.11.8-1
Source reference: /affected/2/versions
3.11.8-1.1~exp1
Source reference: /affected/2/versions
3.11.8-1.1~exp2
Source reference: /affected/2/versions
3.11.8-2
Source reference: /affected/2/versions
3.11.8-3
Source reference: /affected/2/versions
3.11.8-3+hurd.1
Source reference: /affected/2/versions
3.11.9-1
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

python3.13

Source reference: /affected/3/package/name

Affected versions: 3.13.5-2
Source reference: /affected/3/versions
3.13.5-2+deb13u1
Source reference: /affected/3/versions
3.13.5-2+deb13u2
Source reference: /affected/3/versions
3.13.5-2+deb13u3
Source reference: /affected/3/versions
3.13.5-2+deb13u4
Source reference: /affected/3/versions
Fixed versions: 3.13.5-2+deb13u5
Source reference: /affected/3/ranges
Prerequisites: Not stated in this record

python3.13

Source reference: /affected/4/package/name

Affected versions: 3.13.11-1
Source reference: /affected/4/versions
3.13.12-1
Source reference: /affected/4/versions
3.13.14-1
Source reference: /affected/4/versions
3.13.5-2
Source reference: /affected/4/versions
3.13.6-1
Source reference: /affected/4/versions
3.13.7-1
Source reference: /affected/4/versions
3.13.8-1
Source reference: /affected/4/versions
3.13.9-1
Source reference: /affected/4/versions
Fixed versions: 3.13.15-1
Source reference: /affected/4/ranges
Prerequisites: Not stated in this record

python3.14

Source reference: /affected/5/package/name

Affected versions: 3.14.0-1
Source reference: /affected/5/versions
3.14.0-2
Source reference: /affected/5/versions
3.14.0-3
Source reference: /affected/5/versions
3.14.0-4
Source reference: /affected/5/versions
3.14.0-5
Source reference: /affected/5/versions
3.14.0~a7-1
Source reference: /affected/5/versions
3.14.0~b1-1
Source reference: /affected/5/versions
3.14.0~b2-1
Source reference: /affected/5/versions
3.14.0~b3-1
Source reference: /affected/5/versions
3.14.0~b4-1
Source reference: /affected/5/versions
3.14.0~rc1-1
Source reference: /affected/5/versions
3.14.0~rc2-1
Source reference: /affected/5/versions
3.14.0~rc3-1
Source reference: /affected/5/versions
3.14.2-1
Source reference: /affected/5/versions
3.14.3-1
Source reference: /affected/5/versions
3.14.3-2
Source reference: /affected/5/versions
3.14.3-3
Source reference: /affected/5/versions
3.14.3-4
Source reference: /affected/5/versions
3.14.3-5
Source reference: /affected/5/versions
3.14.4-1
Source reference: /affected/5/versions
3.14.4-2
Source reference: /affected/5/versions
3.14.5-1
Source reference: /affected/5/versions
3.14.5~rc1-1
Source reference: /affected/5/versions
3.14.6-1
Source reference: /affected/5/versions
Fixed versions: 3.14.7-1
Source reference: /affected/5/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"
          }
        ]
      }
    ],
    "package": {
      "name": "pypy3",
      "purl": "pkg:deb/debian/pypy3?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "7.3.19+dfsg-2",
      "7.3.20+dfsg-1",
      "7.3.20+dfsg-2",
      "7.3.20+dfsg-3",
      "7.3.20+dfsg-4",
      "7.3.21+dfsg-1",
      "7.3.21+dfsg-2",
      "7.3.21+dfsg-3",
      "7.3.21+dfsg-4",
      "7.3.22+dfsg-1",
      "7.3.23+dfsg-1",
      "7.3.23+dfsg-2",
      "8.0.0+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11940.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "8.0.0+dfsg-1"
          }
        ]
      }
    ],
    "package": {
      "name": "pypy3",
      "purl": "pkg:deb/debian/pypy3?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "7.3.19+dfsg-2",
      "7.3.20+dfsg-1",
      "7.3.20+dfsg-2",
      "7.3.20+dfsg-3",
      "7.3.20+dfsg-4",
      "7.3.21+dfsg-1",
      "7.3.21+dfsg-2",
      "7.3.21+dfsg-3",
      "7.3.21+dfsg-4",
      "7.3.22+dfsg-1",
      "7.3.23+dfsg-1",
      "7.3.23+dfsg-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11940.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.11",
      "purl": "pkg:deb/debian/python3.11?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.11.2-6",
      "3.11.2-6+deb12u1",
      "3.11.2-6+deb12u2",
      "3.11.2-6+deb12u3",
      "3.11.2-6+deb12u4",
      "3.11.2-6+deb12u5",
      "3.11.2-6+deb12u6",
      "3.11.2-6+deb12u7",
      "3.11.2-6+deb12u8",
      "3.11.3-1",
      "3.11.3-2",
      "3.11.4-1",
      "3.11.5-1",
      "3.11.5-2",
      "3.11.5-3",
      "3.11.6-1",
      "3.11.6-2",
      "3.11.6-3",
      "3.11.6-3~hurd.2",
      "3.11.7-1",
      "3.11.7-2",
      "3.11.8-1",
      "3.11.8-1.1~exp1",
      "3.11.8-1.1~exp2",
      "3.11.8-2",
      "3.11.8-3",
      "3.11.8-3+hurd.1",
      "3.11.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11940.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.13.5-2+deb13u5"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.13",
      "purl": "pkg:deb/debian/python3.13?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.13.5-2",
      "3.13.5-2+deb13u1",
      "3.13.5-2+deb13u2",
      "3.13.5-2+deb13u3",
      "3.13.5-2+deb13u4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11940.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.13.15-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.13",
      "purl": "pkg:deb/debian/python3.13?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.13.11-1",
      "3.13.12-1",
      "3.13.14-1",
      "3.13.5-2",
      "3.13.6-1",
      "3.13.7-1",
      "3.13.8-1",
      "3.13.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11940.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.14.7-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.14",
      "purl": "pkg:deb/debian/python3.14?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.14.0-1",
      "3.14.0-2",
      "3.14.0-3",
      "3.14.0-4",
      "3.14.0-5",
      "3.14.0~a7-1",
      "3.14.0~b1-1",
      "3.14.0~b2-1",
      "3.14.0~b3-1",
      "3.14.0~b4-1",
      "3.14.0~rc1-1",
      "3.14.0~rc2-1",
      "3.14.0~rc3-1",
      "3.14.2-1",
      "3.14.3-1",
      "3.14.3-2",
      "3.14.3-3",
      "3.14.3-4",
      "3.14.3-5",
      "3.14.4-1",
      "3.14.4-2",
      "3.14.5-1",
      "3.14.5~rc1-1",
      "3.14.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-11940.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #55466 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 15:57:26 GMT
Publisher date: Tue, 23 Jun 2026 17:16:40 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-11940 · Revision 1Source updated