CVE-2026-102996

UNKNOWN 0.0

pypdf: Possible large memory usage when parsing font data

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can provide a TrueType or Type1 simple font with an unusually large /Widths array, causing pypdf/_font.py Font._collect_tt_t1_character_widths to process entries beyond the 256 character codes meaningful for a simple font and consume excessive memory during operations such as text extraction. This issue is fixed in version 6.18.1.

CWE	CWE-400
Vendor	py-pdf
Product	pypdf
Published	Sep 30, 2026
Last Updated	Sep 30, 2026

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Affected Versions

py-pdf / pypdf

< 6.18.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9cg-prrw-2r8q github.com: https://github.com/py-pdf/pypdf/pull/4072 github.com: https://github.com/py-pdf/pypdf/commit/0fb26eb8cdd01c44b3b2c9fe8329751be2f7cfd5 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.18.1