GHSA-x8qc-fggm-mpqg

Source

https://github.com/advisories/GHSA-x8qc-fggm-mpqg

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-x8qc-fggm-mpqg/GHSA-x8qc-fggm-mpqg.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-x8qc-fggm-mpqg

Aliases

Downstream

CGA (4)

MINI (1)

MINI-478v-jgqg-cx74

Published

2026-05-04T15:31:14Z

Modified

2026-07-29T03:49:36Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:L/U:Red CVSS Calculator

Summary

Ollama contains a heap out-of-bounds read vulnerability in the GGUF model loader

Details

Ollama before 0.17.1 contains a heap out-of-bounds read vulnerability in the GGUF model loader. The /api/create endpoint accepts an attacker-supplied GGUF file in which the declared tensor offset and size exceed the file's actual length; during quantization in fs/ggml/gguf.go and server/quantization.go (WriteTo()), the server reads past the allocated heap buffer. The leaked memory contents may include environment variables, API keys, system prompts, and concurrent users' conversation data, and can be exfiltrated by uploading the resulting model artifact through the /api/push endpoint to an attacker-controlled registry. The /api/create and /api/push endpoints have no authentication in the upstream distribution. Default deployments bind to 127.0.0.1, but the documented OLLAMA_HOST=0.0.0.0 configuration is widely used in practice (large public-internet exposure observed).

Database specific

{
    "cwe_ids": [
        "CWE-125"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-08T17:26:00Z",
    "nvd_published_at": "2026-05-04T13:16:01Z",
    "severity": "HIGH"
}

References

Affected packages

Go / github.com/ollama/ollama

Package

Name: github.com/ollama/ollama; View open source insights on deps.dev
Purl: pkg:golang/github.com/ollama/ollama

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.17.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-x8qc-fggm-mpqg/GHSA-x8qc-fggm-mpqg.json"