CVE-2026-113791

UNKNOWN 0.0

pypdf: Possible large memory usage when parsing content streams

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

CWE	CWE-400 CWE-770
Vendor	py-pdf
Product	pypdf
Published	Oct 21, 2026

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Affected Versions

py-pdf / pypdf

< 6.21.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c github.com: https://github.com/py-pdf/pypdf/pull/4218 github.com: https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.21.0