CVE-2026-119207

UNKNOWN 0.0

pypdf: Possible large memory usage for exceptions in strict mode

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory when strict mode loads a crafted invalid PDF dictionary. Nested parsing failures add repeated exception text to newly raised errors, allowing a small malformed dictionary to amplify into very large error messages. This issue is fixed in version 6.21.3.

CWE	CWE-400 CWE-405
Vendor	py-pdf
Product	pypdf
Published	Oct 29, 2026

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Affected Versions

py-pdf / pypdf

< 6.21.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-4vqv-7265-gm2w github.com: https://github.com/py-pdf/pypdf/pull/4265 github.com: https://github.com/py-pdf/pypdf/commit/64270258c0eced720f7960aecf8cef31afd39f8d github.com: https://github.com/py-pdf/pypdf/releases/tag/6.21.3