Out-of-bounds Read in Ollama
CVE-2026-5757
Unauthenticated remote information disclosure vulnerability in Ollama's model quantization engine allows an attacker to read and exfiltrate the server's heap memory, potentially leading to sensitive data exposure, further compromise, and stealthy persistence.
Vulnerability class: Buffer Overflow
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:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.6% 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)
References
- kb.cert.org/vuls/id/518910 (VDB Entry, Third Party Advisory)
- ollama.com (Product)
- af854a3a-2127-422b-91ae-364da2661108 (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-5757?
- CVE-2026-5757 is a high-severity vulnerability in Ollama, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-06-26.
- How severe is CVE-2026-5757?
- High severity. CVSS v3 base score is 7.5 out of 10.