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CVE-2025-66959

26
FAUCET Score

CVE-2025-66959 describes a denial-of-service vulnerability in ollama version 0.12.10, specifically within its GGUF decoder component. This flaw allows a remote unauthenticated attacker to disrupt the service's availability with low attack complexity, earning a CVSS score of 7.5 (High). Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.12.10CPE matchmatch criteria
cpe:2.3:a:ollama:ollama:0.12.10:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.55%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0455 is in the 83rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

github_advisoryvendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenShift AI (RHOAI)Fixed in: rhoai/odh-trustyai-ragas-lls-provider-dsp-rhel9

Vendor Advisories (1)

redhatCVE-2025-66959Moderate

ollama: ollama: Denial of Service via GGUF decoder

Jan 21, 2026

References

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