bit-python-2026-114583

bitnami_vulndb
Description

tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process. This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.

Timeline
Published
unknown
Last Modified
unknown
CVSS Details

CVSS details not available.

Affected Products

No product information available.

References
Linked Vulnerabilities

No linked vulnerabilities found.

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "python",
        "purl": "pkg:bitnami/python"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.18"
            },
            {
              "introduced": "3.12.0"
            },
            {
              "fixed": "3.12.16"
            },
            {
              "introduced": "3.13.0"
            },
            {
              "fixed": "3.13.18"
            },
            {
              "introduced": "3.14.0"
            },
            {
              "fixed": "3.14.10"
            },
            {
              "introduced": "3.15.0"
            },
            {
              "fixed": "3.15.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-114583"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter=\"tar\" to write files outside the destination directory, subject to the permissions of the extracting process.\n\nThis is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.",
  "id": "BIT-python-2026-114583",
  "modified": "2026-10-30T15:59:08.834Z",
  "published": "2026-10-29T12:19:39.543Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/04d8fca7da2cf3ebc0881fec8a53a1330c3b665d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/0901ad4ffb22605f12b705d1c1197f0a01f0ba0b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/bc93f8ad4c4a0f92d184ec8fccc8ff8a651dcec2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/c6ada40177436e4e2533a7b252082b5f0c043477"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/e7e0b3523ad6ba8472873dda594cf4021a16f8b5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/f4401da82e2baec5dab06cf070fbca77d53220f0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/160097"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/160098"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/43JOWPRAV5DI3VZ4FUEUAZOHCATXXOCK/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114583"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "tar filter allows writing outside destination via empty-named symlink"
}
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