Vulnerability · Published Oct 30, 2026 · Assigned by GitHub_M

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

Medium 5.5

In plain English

A medium-severity integer overflow 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 3.1)5.5Medium

Exploit odds (30 days)0.1%top 98.1% 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 5.5.4, 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	tesseract	no fix listed	DEBIAN-CVE-2026-119340
Debian:13	tesseract	no fix listed	DEBIAN-CVE-2026-119340
Debian:14	tesseract	no fix listed	DEBIAN-CVE-2026-119340
Ubuntu:26.10	tesseract	no fix listed	UBUNTU-CVE-2026-119340

Affected products (as reported)

Vendor	Product	Versions
tesseract-ocr	tesseract	< 5.5.4

Weakness: CWE-190, CWE-681 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-6xhq-wvww-6xfg x_refsource_CONFIRM
https://github.com/tesseract-ocr/tesseract/pull/4649 x_refsource_MISC
https://github.com/tesseract-ocr/tesseract/commit/048e92378f1a34dcdaf94bc515c7552ac01f08ef x_refsource_MISC
https://github.com/tesseract-ocr/tesseract/releases/tag/5.5.4 x_refsource_MISC