A denial-of-service vulnerability exists in the Ollama software's downloadBlob function due to improper validation of array indices. (CVE-2026-15685)
A denial-of-service vulnerability exists in the Ollama software's downloadBlob function due to improper validation of array indices. This flaw allows remote attackers to cause a denial-of-service condition without requiring authentication by triggering memory access beyond allocated array bounds.
AI Analysis
Technical Summary
CVE-2026-15685 describes a high-severity vulnerability in Ollama's downloadBlob function where insufficient validation of user-supplied array indices can lead to out-of-bounds memory access. This results in a denial-of-service condition. The vulnerability can be exploited remotely without authentication. The issue is categorized under CWE-129 (Improper Validation of Array Index). No patch or remediation details are currently provided.
Potential Impact
Exploitation of this vulnerability allows remote attackers to cause a denial-of-service (DoS) condition on affected Ollama installations by triggering memory access past the end of an allocated array. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, monitor official sources for updates and consider limiting exposure of the affected service to untrusted networks.
A denial-of-service vulnerability exists in the Ollama software's downloadBlob function due to improper validation of array indices. (CVE-2026-15685)
Description
A denial-of-service vulnerability exists in the Ollama software's downloadBlob function due to improper validation of array indices. This flaw allows remote attackers to cause a denial-of-service condition without requiring authentication by triggering memory access beyond allocated array bounds.
CVSS v3.0
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-15685 describes a high-severity vulnerability in Ollama's downloadBlob function where insufficient validation of user-supplied array indices can lead to out-of-bounds memory access. This results in a denial-of-service condition. The vulnerability can be exploited remotely without authentication. The issue is categorized under CWE-129 (Improper Validation of Array Index). No patch or remediation details are currently provided.
Potential Impact
Exploitation of this vulnerability allows remote attackers to cause a denial-of-service (DoS) condition on affected Ollama installations by triggering memory access past the end of an allocated array. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, monitor official sources for updates and consider limiting exposure of the affected service to untrusted networks.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-c7vp-gjfc-x6p8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-15685"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.0
Threat ID: 6a55ff8568715ace432f4325
Added to database: 07/14/2026, 09:21:09 UTC
Last enriched: 07/14/2026, 09:43:23 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 43
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