CVE-2026-15685CWE-129

Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability

High · published July 13, 2026

CVSS v3.0
7.5
EPSS
1%
Percentile
53.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
7.5 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00715 · 53.2th percentile
Weakness
CWE-129 · Improper Validation of Array Index
Published
2026-07-13T21:30Z
EPSS history
Timeline
  • 13 JUL 21:30Z
    Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability
    cvelistv5