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CVE-2026-86289

4.3 · MEDIUM

A vulnerability was found in Ollama up to 0.31.1.

Published Sep 7, 2026CWE-189EPSS 0.69%

Overview

CVE-2026-86289 is a medium-severity vulnerability. It was published on September 7, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/ollama/ollama/GitHubgithub.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724bGitHubgithub.com/ollama/ollama/issues/17033GitHubgithub.com/ollama/ollama/pull/17062GitHubgithub.com/ollama/ollama/releases/tag/v0.31.2-rc1Refvuldb.com/cve/CVE-2026-86289Refvuldb.com/submit/906136Refvuldb.com/vuln/399448Refvuldb.com/vuln/399448/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-86289?

CVE-2026-86289 is a medium-severity vulnerability. It was published on September 7, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-86289?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-86289?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-86289?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-86289 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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