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CVE-2026-119339

Tesseract: Crafted LSTM model (`WeightMatrix` mode byte) triggers `ASSERT_HOST` abort in `WeightMatrix::DeSerializeOld` under `FAST_FLOAT` — Denial of Service

CVSS score

5.5

EPSS probability

—

Risk score

0.6

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-119339: Tesseract LSTM Model Denial of Service Vulnerability

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

CVE-2026-119339 in the Tesseract open-source OCR engine involves a crafted LSTM model triggering WeightMatrix::DeSerializeOld, causing a process abort via ASSERT_HOST resulting in a denial of service.

Why does it matter?

This vulnerability can lead to application crashes and service outages through the loading of a crafted model, causing operational disruptions.

What should be done?

  • Update Tesseract to version 5.5.4 or later
  • Follow vendor security advisories
Chain of evidence and sources2 verified claims

Tesseract 5.5.4 öncesi sürümlerde, WeightMatrix::DeSerialize fonksiyonu LSTM ağından gelen mod baytına güvenmektedir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Varsayılan FAST_FLOAT derlemelerinde ASSERT_HOST tetiklenerek süreç sonlandırma ve servis kesintisi oluşur.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd
Show the technical text 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.

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE: CWE-20, CWE-617

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-119339 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1tesseract-ocrtesseract View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.5CVSS V3_1MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HCVE CNA
5.5CVSS V31MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-119339 is associated with the following CWEs:

CWE-20: Improper Input ValidationCWE-617: Common Weakness Enumeration Entry CWE-617

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-119339 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsGerekmiyor
UserGerekiyor

Official Sources and Advisories

https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-h9g4-frjx-6cj3vendor-advisoryhttps://github.com/tesseract-ocr/tesseract/pull/4657vendor-advisoryhttps://github.com/tesseract-ocr/tesseract/commit/c053424327352b9d5180aa7540c1f9e67c64f27evendor-advisoryhttps://github.com/tesseract-ocr/tesseract/releases/tag/5.5.4vendor-advisory

CVSS Vector Radar Chart

5.5 / 10
Attack VectorLocalComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone required
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Weakness Type (CWE & CAPEC)

CWE-20 CWE-617

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CVE-2026-119339 · Tesseract: Crafted LSTM model…