GHSA-x7hp-r3qg-r3cjMedium
pypdf: Manipulated FlateDecode XFA streams can exhaust RAM
🔗 CVE IDs covered (1)
📋 Description
Impact
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.
Patches
This has been fixed in pypdf==6.7.3.
Workarounds
If projects cannot upgrade yet, consider applying the changes from PR #3658.
🎯 Affected products1
- pip/pypdf:< 6.7.3
🔗 References (6)
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj
- https://nvd.nist.gov/vuln/detail/CVE-2026-27888
- 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
- https://github.com/advisories/GHSA-x7hp-r3qg-r3cj