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Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-73067Tesseract: Heap OOB read in the DAWG loader

Medium 6.7

In plain English

A medium-severity out-of-bounds read in tesseract from tesseract-ocr. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 4.0)6.7Medium
Exploit odds (30 days)0.1%top 97.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12tesseractno fix listedDEBIAN-CVE-2026-73067
Debian:13tesseractno fix listedDEBIAN-CVE-2026-73067
Debian:14tesseractno fix listedDEBIAN-CVE-2026-73067
Ubuntu:26.10tesseractno fix listedUBUNTU-CVE-2026-73067

Affected products (as reported)

VendorProductVersions
tesseract-ocr tesseract < 5.5.3

Weakness: CWE-125 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References