Medium 4.3Published Sep 7, 2026

CVE-2026-86289Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects n/a Ollama. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for n/a Ollama

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-190, CWE-189
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Sep 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a Ollama ollama:ollama	0.31.0; 0.31.1; 0.31.2-rc1 not affected	CNA record

References

https://vuldb.com/vuln/399448vdb-entry, technical-description
https://vuldb.com/vuln/399448/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-86289third-party-advisory
https://vuldb.com/submit/906136third-party-advisory
https://github.com/ollama/ollama/issues/17033exploit, issue-tracking
https://github.com/ollama/ollama/pull/17062issue-tracking, patch
https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724bpatch
https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1patch
https://github.com/ollama/ollama/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.