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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 9
https://github.com/ollama/ollama/
cna@vuldb.com
https://github.com/ollama/ollama/commit/67b6a1c2d45321e0cb3c04a18073f9818de7724b
cna@vuldb.com
https://github.com/ollama/ollama/issues/17033
cna@vuldb.com
https://github.com/ollama/ollama/pull/17062
cna@vuldb.com
https://github.com/ollama/ollama/releases/tag/v0.31.2-rc1
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-86289
cna@vuldb.com
https://vuldb.com/submit/906136
cna@vuldb.com
https://vuldb.com/vuln/399448
cna@vuldb.com
https://vuldb.com/vuln/399448/cti
cna@vuldb.com