CVE-2026-86289

Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow

LOW 2.1EPSS 0.7%

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: Ollama
CVSS v4.0 VULDB: 2.1 LOWCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 VULDB: 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CVSS v2.0 VULDB: 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS: 0.69% chance of exploitation in the next 30 days, 52nd percentile
Published: 2026-09-07
Updated: 2026-09-11

Proof-of-concept exploits (1)

ollama/ollama/issues/17033183394★ · 2026-10-16

CVE-2026-86289

Proof-of-concept exploits (1)

References

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