Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.

INFO

Published Date :

2026-01-10T04:46:12.423Z

Last Modified :

2026-01-12T16:48:53.503Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-22691 vulnerability.

Vendors Products
Py-pdf
  • Pypdf
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-22691.

URL Resource
https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/pull/3594 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/releases/tag/6.6.0 cve-icon cve-icon cve-icon
https://github.com/py-pdf/pypdf/security/advisories/GHSA-4f6g-68pf-7vhv cve-icon cve-icon cve-icon
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