CVE-2026-28804

Summary

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

Affected Software

Weaknesses

• CWE-407: CWE-407: Inefficient Algorithmic Complexity

ADP Enrichment

CISA ADP Vulnrichment

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

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852
• https://github.com/py-pdf/pypdf/pull/3666
• https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f
• https://github.com/py-pdf/pypdf/releases/tag/6.7.5

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