CVE-2026-86289
Medium
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.
SeverityMedium
CVSS4.3
Exploit probability—
ProductOllama
PublishedSep 7, 2026
First seenSep 7, 2026
Weakness typeCWE-190Integer overflowCWE-189CWE-189
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ollama ollama | 0.31.0, 0.31.1 | — |
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