CVE-2026-54531

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.0, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with outlines into a writer. This vulnerability is fixed in 6.13.0.

Affected Software

Weaknesses

• CWE-835: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-m2v9-299j-rv96
• https://github.com/py-pdf/pypdf/pull/3830
• https://github.com/py-pdf/pypdf/releases/tag/6.13.0

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