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CVE-2026-119339medium5.5

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

Impact

Tesseract OCR engine versions prior to 5.5.4 are vulnerable to denial of service when loading a crafted LSTM model, due to improper input validation and a reachable assertion. The issue occurs in FAST_FLOAT builds when WeightMatrix::DeSerializeOld is called. Local access is required to load the crafted model.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

tesseract-ocr · GitHub_M

tesseract

1 range
GitHub_M version evidence

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affected

< 5.5.4

unaffected

unknown

Other versions: unknown

Original source description

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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-119339

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-20 ↗

CWE-20: Improper Input Validation

GitHub_M

Related →
CWE-617 ↗

CWE-617: Reachable Assertion

GitHub_M

Related →
Contributing organizations · 2
GitHub_M

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-119339

    Observed 2026-10-30T22:48:19.900Z · upstream updated 2026-10-30T22:13:31.619Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T21:18:18.116329Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

4 sources
github.com/tesseract-ocr/tesseract/security/advisories/GHSA-h9g4-frjx-6cj3
Security advisoryGitHub_M
github.com/tesseract-ocr/tesseract/pull/4657
PatchGitHub_M
github.com/tesseract-ocr/tesseract/commit/c053424327352b9d5180aa7540c1f9e67c64f27e
PatchGitHub_M
github.com/tesseract-ocr/tesseract/releases/tag/5.5.4
Release notesGitHub_M