CVE-2026-119204

UNKNOWN 0.0

pypdf: Possible large memory usage when parsing page tree

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400
Vendor	py-pdf
Product	pypdf
Published	Oct 29, 2026

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Affected Versions

py-pdf / pypdf

< 6.21.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-cggf-277g-3q54 github.com: https://github.com/py-pdf/pypdf/pull/4290 github.com: https://github.com/py-pdf/pypdf/commit/ea4ac663133f1b3de1d7a8f2e6fa239802fde79e github.com: https://github.com/py-pdf/pypdf/releases/tag/6.21.4