Is CVE-2026-119340 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-119340 being exploited in the wild.

How severe is CVE-2026-119340?

Medium severity, with a CVSS score of 5.5, published 30 October 2026.

Which products and versions are affected?

Tesseract OCR Tesseract prior to 5.5.4.

Is there a fix for CVE-2026-119340?

Yes: fixed in 5.5.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-119340 attacked?

It is attacked with local access.

Am I affected by CVE-2026-119340?

Check whether you run Tesseract OCR Tesseract at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-119340: Tesseract matrix deserialization integer overflow denial of service

CVE-2026-119340 · Severity: medium · CVSS 5.5 · Published 2026-10-30

Tesseract is an open-source optical character recognition (OCR) engine used to extract text from images and documents. A flaw in how it reads matrix dimensions from traineddata files allows an attacker to supply a crafted file that triggers memory allocation failures or out-of-bounds memory access, causing the application to crash and preventing legitimate OCR operations.

Technologies: Tesseract OCR Tesseract. Vendors: Tesseract OCR.

Quick answers

Is CVE-2026-119340 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-119340 being exploited in the wild.
How severe is CVE-2026-119340?: Medium severity, with a CVSS score of 5.5, published 30 October 2026.
Which products and versions are affected?: Tesseract OCR Tesseract prior to 5.5.4.
Is there a fix for CVE-2026-119340?: Yes: fixed in 5.5.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-119340 attacked?: It is attacked with local access.
Am I affected by CVE-2026-119340?: Check whether you run Tesseract OCR Tesseract at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 5.5.4

Technical details

GENERIC_2D_ARRAY::DeSerializeSize in matrix.h reads matrix dimensions as signed int32_t and validates only against UINT16_MAX, allowing negative values to pass validation and reach ResizeNoInit. Negative dimensions or large products cause signed integer overflow and out-of-bounds accesses in IntSimdMatrix when parsing a malicious traineddata file. The vulnerability is triggered by loading a crafted traineddata file and requires no authentication or network access beyond file delivery.

Affected products

Tesseract OCR Tesseract prior to 5.5.4

Timeline

2026-10-30: disclosed
2026-10-18: patched

References

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