Resource Exhaustion Affecting pypdf package, versions <6.9.0-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.41% (34th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PYPDF-14912619
  • published11 Jan 2026
  • disclosed10 Jan 2026

Introduced: 10 Jan 2026

CVE-2026-22691  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

Upgrade Debian:unstable pypdf to version 6.9.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pypdf package and not the pypdf package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1