High severity · published Jan 21, 2026
CVE-2025-66960
An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the fs/ggml/gguf.go, function readGGUFV1String reads a string length from untrusted GGUF…
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the fs/ggml/gguf.go, function readGGUFV1String reads a string length from untrusted GGUF metadata
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OL
Ollama · Ollama
0.12.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-66960
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-66960
Exploit
https://github.com/ollama/ollama/issues/9820
Exploit
https://zero.shotlearni.ng/blog/cve-2025-66960guf-v1-string-length-cause-panic-in-readggufv1string/
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