CVE-2026-27888

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the xfa property of a reader or writer and the corresponding stream being compressed using /FlateDecode. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

Affected Software

Weaknesses

• CWE-400: CWE-400: Uncontrolled Resource Consumption

ADP Enrichment

CISA ADP Vulnrichment

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

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj
• https://github.com/py-pdf/pypdf/pull/3658
• https://github.com/py-pdf/pypdf/commit/7a4c8246ed48d9d328fb596942271da47b6d109c
• https://github.com/py-pdf/pypdf/releases/tag/6.7.3

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