Résumé
pypdf: Possible long runtimes for partially malformed FlateDecode streams (Follow-up)
Détails de l’avis
Impact
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a partially malformed /FlateDecode stream, where the byte-by-byte decompression is used.
Patches
This has been fixed in pypdf==6.18.1.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #4073.
Références
- https://github.com/advisories/GHSA-jw7q-gvrg-4vj3
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-jw7q-gvrg-4vj3
- https://nvd.nist.gov/vuln/detail/CVE-2026-102997
- https://github.com/py-pdf/pypdf/pull/4073
- https://github.com/py-pdf/pypdf/commit/d9d38cf99b115deb562d3b68f36c33027bc04f79
- https://github.com/py-pdf/pypdf/releases/tag/6.18.1
Vulnérabilités liées
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devalue: Residual sparse-array CPU amplification in uneval
- HIGHCVE-2026-102999
pypdf: Possible long runtimes with large amount of embedded files
- HIGHCVE-2026-102994
pypdf: Possible long runtimes/large memory usage when parsing indirect objects