| Component | Ollama |
| Severity | medium (CVSS 4.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| Published (NVD) | 2026-09-07 |
| Last modified | 2026-09-11 |
| Affected versions | <= 0.31.1 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | see the vendor advisory |
| Weakness | CWE-189CWE-190 |
| CISA KEV | not listed |
NVD 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.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep Ollama off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-86289
- 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
Read more
Other Ollama CVEs
A vulnerability has been found in Ollama up to 0.34.1. The affected element is the function IsValid of the file types/model/name.go of the c...
Ollama is vulnerable to path traversal in the `/api/pull` endpoint due to insufficient validation of layer digests by the `digestToPath` fun...
Ollama versions 0.14.0 before 0.31.2 contain an incorrect authorization vulnerability in the experimental agent mode Bash tool approval mech...
Ollama fails to validate redirect destinations when pulling tensor-layer models, allowing unauthenticated attackers to redirect blob downloa...
A flaw has been found in NightTrek Ollama-mcp up to 80cf2e17cfc144963a475b619093a2d13c13dbc9. This affects an unknown part of the file src/i...
Ollama (HEAD f0078ae) contains an uncontrolled memory allocation vulnerability in the GGUF metadata parser that allows remote attackers to c...