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Vulnerability record · CVE-2025-66959 · published 21 January 2026

CVE-2025-66959: Ollama improper input validation vulnerability

Ollama · Ollama

An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder

7.5 CVSS 3.1 High EPSS 5.2% · top 7.8% CWE-20 · Improper input validationCWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
5.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ollama/ollama/issues/9820 ExploitIssue TrackingVendor Advisory
https://zero.shotlearni.ng/blog/cve-2025-66959panic-dos-via-unchecked-length-in-gguf-decoder-copy/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-66959), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.