CVE-2026-86289
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://github.com/ollama/ollama/
- https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724b
- https://github.com/ollama/ollama/issues/17033
- https://github.com/ollama/ollama/pull/17062
- https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1
- https://vuldb.com/cve/CVE-2026-86289
- https://vuldb.com/submit/906136
- https://vuldb.com/vuln/399448
- https://vuldb.com/vuln/399448/cti
CWEs
CWE-189 CWE-190
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.