Denial of Service Vulnerability in Ollama by Ollama Inc.
CVE-2025-66960

7.5HIGH

Key Information:

Vendor

Ollama Inc.

Status
Ollama
Vendor
CVE Published:
21 January 2026

What is CVE-2025-66960?

A vulnerability exists in Ollama v0.12.10 that allows remote attackers to exploit the function readGGUFV1String within the fs/ggml/gguf.go file, potentially resulting in a denial of service condition. This occurs when the function reads an untrusted string length from GGUF metadata, which may lead to unexpected behavior and service disruption.

References

https://github.com/ollama/ollama/issues/9820
https://zero.shotlearni.ng/blog/cve-2025-66960guf-v1-stri...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.