GHSA-JJ6C-8H6C-HPPX

Vulnerability from github – Published: 2026-04-15 19:43 – Updated: 2026-04-24 20:51
VLAI
Summary
pypdf has long runtimes for wrong size values in cross-reference and object streams
Details

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large /Size values or object streams with wrong large /N values.

Patches

This has been fixed in pypdf==6.10.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3733.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.8 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pypdf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41168"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-834"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-15T19:43:09Z",
    "nvd_published_at": "2026-04-22T21:17:09Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nAn attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values.\n\n### Patches\n\nThis has been fixed in [pypdf==6.10.1](https://github.com/py-pdf/pypdf/releases/tag/6.10.1).\n\n### Workarounds\n\nIf you cannot upgrade yet, consider applying the changes from PR [#3733](https://github.com/py-pdf/pypdf/pull/3733).",
  "id": "GHSA-jj6c-8h6c-hppx",
  "modified": "2026-04-24T20:51:49Z",
  "published": "2026-04-15T19:43:09Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41168"
    },
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/pull/3733"
    },
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/py-pdf/pypdf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/py-pdf/pypdf/releases/tag/6.10.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "pypdf has long runtimes for wrong size values in cross-reference and object streams"
}



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