CVE-2026-73067

Name	CVE-2026-73067
Description	Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata model loaded through TessBaseAPI::Init can cause SquishedDawg::read_squished_dawg in src/dict/dawg.cpp to accept an unterminated forward-edge run, after which SquishedDawg::Load calls num_forward_edges(0) and last_edge in src/dict/dawg.h reads beyond edges_, causing a heap out-of-bounds read and process crash before image processing. This issue is fixed in version 5.5.3.
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	1144388

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
tesseract (PTS)	bullseye	4.1.1-2.1	vulnerable
	bookworm	5.3.0-2	vulnerable
	trixie	5.5.0-1	vulnerable
	forky, sid	5.5.0-1.1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
tesseract	source	(unstable)	(unfixed)			1144388

Notes

[trixie] - tesseract <no-dsa> (Minor issue)
https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-x3vq-7rr7-5x3h
https://github.com/tesseract-ocr/tesseract/pull/4581
Fixed by: https://github.com/tesseract-ocr/tesseract/commit/55287a94b8044c05ce3fd10f5aca6ebbd238e518 (5.5.3)
Fixed by: https://github.com/tesseract-ocr/tesseract/commit/82727cc11c34eaf1249af002d69f6bbae70993b9 (5.5.3)