CVE-2026-15685: high-severity vulnerability in Ollama
Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.7%
Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Ollama. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the downloadBlob function. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated array. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-27277.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Ollama · OllamaRelated CVEs — Ollama
In the same product, most dangerous first.
CVE-2026-42249HIGHRemote Code Execution in Ollama via Update MechanismEPSS 1.0%CVE-2026-65315HIGHOllama Remote Denial of Service via Attacker-Controlled Allocation in GGUF Metadata ParserEPSS 0.8%CVE-2025-15514HIGHOllama Multi-Modal Model Image Processing NULL Pointer DereferenceEPSS 0.8%CVE-2026-42248HIGHMissing Signature Verification for Updates in OllamaEPSS 0.7%CVE-2026-103663MEDIUMPath Traversal leading to Remote Code Execution in OllamaEPSS 0.7%