CVE-2025-66959

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-66959
An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/ollama/ollama/issues/9820 Exploit Issue Tracking Vendor Advisory
https://zero.shotlearni.ng/blog/cve-2025-66959panic-dos-via-unchecked-length-in-gguf-decoder-copy/ Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:ollama:ollama:0.12.10:-:*:*:*:*:*:*
History

02 Feb 2026, 17:27

Type Values Removed Values Added
References () https://github.com/ollama/ollama/issues/9820 - () https://github.com/ollama/ollama/issues/9820 - Exploit, Issue Tracking, Vendor Advisory
References () https://zero.shotlearni.ng/blog/cve-2025-66959panic-dos-via-unchecked-length-in-gguf-decoder-copy/ - () https://zero.shotlearni.ng/blog/cve-2025-66959panic-dos-via-unchecked-length-in-gguf-decoder-copy/ - Exploit, Third Party Advisory
First Time Ollama
Ollama ollama
CPE cpe:2.3:a:ollama:ollama:0.12.10:-:*:*:*:*:*:*

22 Jan 2026, 15:16

Type Values Removed Values Added
CWE CWE-20
CWE-400
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5

21 Jan 2026, 18:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-01-21 18:16

Updated : 2026-02-02 17:27

NVD link : CVE-2025-66959

Mitre link : CVE-2025-66959

CVE.ORG link : CVE-2025-66959

JSON object : View

Products Affected

ollama

  • ollama
CWE
CWE-20

Improper Input Validation

CWE-400

Uncontrolled Resource Consumption