CVE-2026-71852

Name	CVE-2026-71852
Description	pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause long runtimes and large memory consumption when pypdf/_font.py function Font._collect_cid_character_widths expands unusually large CID font /W width ranges or excessive width entries during text extraction. This issue is fixed in 6.15.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1143902

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pypdf (PTS)	bookworm	3.4.1-1+deb12u1	vulnerable
	trixie	5.4.0-1	vulnerable
	forky, sid	6.9.2-2	vulnerable
pypdf2 (PTS)	bullseye	1.26.0-4+deb11u1	vulnerable
	bookworm	2.12.1-3+deb12u1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pypdf	source	(unstable)	(unfixed)			1143902
pypdf2	source	(unstable)	(unfixed)

Notes

[trixie] - pypdf <no-dsa> (Minor issue)
https://github.com/py-pdf/pypdf/security/advisories/GHSA-fwg2-594c-jp42
https://github.com/py-pdf/pypdf/pull/3946
Fixed by: https://github.com/py-pdf/pypdf/commit/51cb6acf9e8a35b77e90b4d87d28fe3e1416d7d7 (6.15.0)