Resource exhaustion in Ollama
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 metadata
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Ollama — versions 0.12.10
Weakness classification (CWE)
References
- github.com/ollama/ollama/issues/9820 (Exploit, Issue Tracking, Vendor Advisory)
- zero.shotlearni.ng/blog/cve-2025-66960guf-v1-string-length-cause-panic-in-readg… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-66960?
- CVE-2025-66960 is a high-severity vulnerability in Ollama, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-01-21.
- How severe is CVE-2025-66960?
- High severity. CVSS v3 base score is 7.5 out of 10.