# CVE-2026-86289

## Summary

- **CVE ID:** CVE-2026-86289
- **Severity:** MEDIUM
- **CVSS Score:** 5.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P)
- **CWE:** CWE-190, CWE-189
- **Published:** Sep 7, 2026
- **Last Modified:** Sep 7, 2026

## 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.

## Affected Products

- n/a — Ollama (0.31.0)
- n/a — Ollama (0.31.1)
- n/a — Ollama (0.31.2-rc1)

## References

- [CNA](https://vuldb.com/vuln/399448)
- [CNA](https://vuldb.com/vuln/399448/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-86289)
- [CNA](https://vuldb.com/submit/906136)
- [CNA](https://github.com/ollama/ollama/issues/17033)
- [CNA](https://github.com/ollama/ollama/pull/17062)
- [CNA](https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724b)
- [CNA](https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1)
- [CNA](https://github.com/ollama/ollama/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 33.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._