Resource exhaustion in Ollama
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
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: 0.052 (92.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.052 · change: +0.006
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-2025-66959panic-dos-via-unchecked-length-in-gguf-de… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-66959?
- CVE-2025-66959 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-2025-66959?
- High severity. CVSS v3 base score is 7.5 out of 10.