CVE-2026-86289

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    CVE-2026-86289

    Published: 7 Sept 2026Last Modified: 13 Sept 2026

    Summary: Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow

    Details: A vulnerability was found in Ollama up to 0.31.1. This issue affects the function readGGUFV1String of the file fs/ggml/gguf.go of the component GGUF Decoder. Performing a manipulation results in integer overflow. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 0.31.2-rc1 is capable of addressing this issue. The patch is named 67b6a1c2d45321e0cb3c04a18073f9818de7724b. It is recommended to upgrade the affected component.

    References: https://github.com/ollama/ollama/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86289.json, https://nvd.nist.gov/vuln/detail/CVE-2026-86289, https://vuldb.com/cve/CVE-2026-86289, https://vuldb.com/submit/906136, https://vuldb.com/vuln/399448, https://github.com/ollama/ollama/issues/17033, https://vuldb.com/vuln/399448/cti, https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724b, https://github.com/ollama/ollama/pull/17062, https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- ada1eb516354a0428c48202b1a8966550056df8e
    Fixed -67b6a1c2d45321e0cb3c04a18073f9818de7724b

    Affected versions

    0.31.0
    0.31.1

    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-2026-86289 | CVE-DB