Auth bypass in Ollama
CVE-2025-63389
A critical authentication bypass vulnerability exists in Ollama platform's API endpoints in versions prior to and including v0.12.3. The platform exposes multiple API endpoints without requiring authentication, enabling remote attackers to perform unauthorized model management operations.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: -0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/ollama/ollama/issues (Issue Tracking)
- gist.github.com/Cristliu/48dae561696374744d9fced07a544ecd (Third Party Advisory)
- gist.github.com/Cristliu/b6f4d070fb27932f581be1aadc0923e7
Frequently asked questions
- What is CVE-2025-63389?
- CVE-2025-63389 is a critical-severity vulnerability in Ollama, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2025-12-18.
- How severe is CVE-2025-63389?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-63389 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.