Denial of Service Vulnerability in Ollama by Ollama
CVE-2025-66959

7.5HIGH

Key Information:

Vendor

Ollama

Status
Ollama
Vendor
CVE Published:
21 January 2026

What is CVE-2025-66959?

A vulnerability exists in Ollama version 0.12.10 that allows a remote attacker to exploit the GGUF decoder. By leveraging this issue, an attacker can trigger a denial of service condition, making the application unresponsive. This poses a significant risk to users relying on the affected version, as it could disrupt functionality and service availability.

References

https://github.com/ollama/ollama/issues/9820
https://zero.shotlearni.ng/blog/cve-2025-66959panic-dos-v...

EPSS Score

5% chance of being exploited in the next 30 days.

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

.