Allocation of Resources Without Limits or Throttling Affecting pypdf package, versions <6.9.0-1


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.17% (7th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-DEBIANUNSTABLE-PYPDF-15325574
  • published21 Feb 2026
  • disclosed20 Feb 2026

Introduced: 20 Feb 2026

CVE-2026-27026  (opens in a new tab)
CWE-770  (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 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. This vulnerability is fixed in 6.7.1.

CVSS Base Scores

version 3.1