Ollama
CVE-2025-66959
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V2 - Validation and Business Logic Input validation, allowlisting
|
| Impact | CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitable via remote/network. Public exploit/POC available. |
| Exploit ScenarioDerived | A remote attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder [CVSS 7.5 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in pypi
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-20 (Improper Input Validation). Affects Ollama. An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder
Executive ViewAI
CVE-2025-66959 presents notable security risk, a input validation vulnerability rated CVSS 7.5. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available, increasing the risk of exploitation. Organizations should apply vendor updates when available and consider compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
Ollama before 0.1.34 does not validate the format of the digest (sha256 with 64 hex digits) when getting the model path,
Remote code execution in Ollama for Windows (versions 0.12.10 through 0.17.5) lets an attacker who can influence HTTP up
Silent auto-update code execution in Ollama for Windows (versions 0.12.10 through 0.17.5) stems from an update-verificat
Remote denial of service in Ollama (HEAD f0078ae) allows unauthenticated attackers to crash the entire server by uploadi
Denial of service in Ollama's multi-modal image processing (versions 0.11.5-rc0 through 0.13.5) lets remote attackers cr
An issue was discovered in Ollama before 0.1.46. Rated high severity (CVSS 8.2), this vulnerability is remotely exploita
A vulnerability in the Ollama server version 0.5.11 allows a malicious user to cause a Denial of Service (DoS) attack by
Information disclosure in Ollama's model quantization engine (confirmed affected in v0.13.5) allows remote, unauthentica
A vulnerability in ollama/ollama versions <=0.3.14 allows a malicious user to upload and create a customized GGUF model
An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the fs/ggml/gguf.go, function rea
A divide by zero vulnerability exists in ollama/ollama version v0.3.3. Rated high severity (CVSS 7.5), this vulnerabilit
A vulnerability in ollama/ollama versions <=0.3.14 allows a malicious user to create a customized GGUF model file that,
Exploit-DB