---
id: "CVE-2026-119339"
kind: "vulnerability"
aliases: ["CVE-2026-119339"]
title: "Tesseract OCR: crafted model file crashes the process via denial of service"
severity: "medium"
cvss: 5.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["c++", "ocr", "package", "tesseract"]
not_affected_if: ["pre-5.5.4-not-used", "trusted-models-only"]
published_at: "2026-10-30T21:16:51+00:00"
first_seen_at: "2026-10-30T21:25:52+00:00"
updated_at: "2026-10-30T21:26:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119339", "first_seen_at": "2026-10-30T21:25:52+00:00"}]
---

# Tesseract OCR: crafted model file crashes the process via denial of service

Tesseract is an open source OCR engine. A crafted traineddata model loaded through TessBaseAPI::Init triggers an assertion in default builds that terminates the process, causing a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Tesseract version with `tesseract --version`, and check any bundled or vendored copy in your application dependencies.
- Look for code paths that load traineddata models from untrusted sources through TessBaseAPI::Init.

## Fix

- Move to `5.5.4` or later.

## Timeline

- 2026-10-30T21:25:52+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119339

## From the sources

Tesseract is an open source OCR engine. Prior to 5.5.4, WeightMatrix::DeSerialize trusts a mode byte from a traineddata LSTM network and calls WeightMatrix::DeSerializeOld when kDoubleFlag is clear. In default FAST_FLOAT builds, DeSerializeOld invokes ASSERT_HOST instead of returning an error, so loading a crafted model through TessBaseAPI::Init terminates the process and causes denial of service. This issue is fixed in version 5.5.4.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_