CVE-2026-49460

Summary

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /FlateDecode filter with a PNG predictor. This vulnerability is fixed in 6.12.2.

Affected Software

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hgr-hg42-57jg
• https://github.com/py-pdf/pypdf/pull/3806
• https://github.com/py-pdf/pypdf/releases/tag/6.12.2

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