CVE-2026-119340 Tesseract: GENERIC_2D_ARRAY DeSerializeSize signed integer comparison bypass allows negative dimensions

Medium 5.5 Published 30 Oct 2026 Updated 5 Nov 2026

Exploited in the wild: Not known
Fix: Available

What is CVE-2026-119340?

CVE-2026-119340 is a medium-severity vulnerability in tesseract-ocr tesseract, published on 30 Oct 2026.

Official description

Tesseract is an open source OCR engine. Prior to 5.5.4, GENERIC_2D_ARRAY::DeSerializeSize in src/ccstruct/matrix.h reads matrix dimensions as signed int32_t values and compares them only with UINT16_MAX, allowing negative values to reach ResizeNoInit. Negative dimensions or a 65535 by 65535 product can create inconsistent allocation state and later out-of-bounds accesses while loading a crafted traineddata file, causing denial of service. This issue is fixed in version 5.5.4.

Weakness: CWE-681, CWE-190

Which versions are affected by CVE-2026-119340?

How do I fix CVE-2026-119340?

Upgrade to a fixed version.

Is CVE-2026-119340 being exploited?

There is no known exploitation of CVE-2026-119340 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2026-119340, ECHO-b364-774d-e3bf, GHSA-6xhq-wvww-6xfg, UBUNTU-CVE-2026-119340.