CVE-2026-119339

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    CVE-2026-119339

    Published: 30 Oct 2026Last Modified: 4 Nov 2026

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

    Details: 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.

    References: https://github.com/tesseract-ocr/tesseract/releases/tag/5.5.4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119339.json, https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-h9g4-frjx-6cj3, https://nvd.nist.gov/vuln/detail/CVE-2026-119339, https://github.com/tesseract-ocr/tesseract/commit/c053424327352b9d5180aa7540c1f9e67c64f27e, https://github.com/tesseract-ocr/tesseract/pull/4657

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -7e548e6eff172f38f97664afe7f7ce40db36c8d6

    Affected versions

    5.5.3
    5.5.2
    5.5.1
    5.5.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-119339 | CVE-DB