HIGH 7.1 NVD
CVE-2026-119204
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing ma
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4.
References
- https://github.com/py-pdf/pypdf/commit/ea4ac663133f1b3de1d7a8f2e6fa239802fde79e
- https://github.com/py-pdf/pypdf/pull/4290
- https://github.com/py-pdf/pypdf/releases/tag/6.21.4
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-cggf-277g-3q54
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-10-29 via NVD.
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