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Advisory record · GHSA-52x6-gq3r-vpf4

pypdf: Possible infinite loop when retrieving fonts for layout-mode text extraction

CVSS 6.9 MediumEPSS 0.0017 · 6th percentile

Published by the GitHub Advisory Database at 16 Jun 2026, 14:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pypdfPyPI<6.13.06.13.0
Identifiers
GHSA-52x6-gq3r-vpf4 · CVE-2026-54530 · PYSEC-2026-3009
Weakness (CWE)
CWE-835
Tags
Published
16 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

pypdf versions before 6.13.0 are vulnerable. An attacker who supplies a crafted PDF can cause an infinite loop when the text is extracted in layout mode. Upgrade to pypdf 6.13.0 or later. The source gives no other workaround besides applying an upstream change, so the upgrade is the practical fix.

Written 4 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.9 Medium 4.0 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0017, the 6th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 22 Jun 2026, 21:16 UTC Confirmed by NVD
  2. 31 Oct 2026, 14:29 UTC First seen by agentprime
  3. 31 Oct 2026, 14:29 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.