CVE-2026-86289CWE-190

CVE-2026-86289

Medium · published September 7, 2026

CVSS v3.1
4.3
EPSS
1%
Percentile
52.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS v4.0
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
EPSS
0.00688 · 52.2th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-09-07T13:17Z
References (9)
https://github.com/ollama/ollama/ · [email protected]https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724b · [email protected]https://github.com/ollama/ollama/issues/17033 · [email protected]https://github.com/ollama/ollama/pull/17062 · [email protected]https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1 · [email protected]https://vuldb.com/cve/CVE-2026-86289 · [email protected]https://vuldb.com/submit/906136 · [email protected]https://vuldb.com/vuln/399448 · [email protected]https://vuldb.com/vuln/399448/cti · [email protected]
EPSS history
Timeline
  • 08 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 07 SEP 08:45Z
    Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow
    cvelistv5