← Vulnerability feed

Vulnerability record · CVE-2026-15685 · published 13 July 2026

CVE-2026-15685: Ollama vulnerability

Ollama · Ollama

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.

7.5 CVSS 3.0 High EPSS 0.72% · top 48.2% CWE-129 · CWE-129
7.5CVSS 3.0 base score
0.72%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
14 Jul 2026Last modified by NVD

Description

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

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zerodayinitiative.com/advisories/ZDI-26-403/ Third Party Advisory

Track CVE-2026-15685 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-63389Ollama missing authentication for critical function vulnerabilityA critical authentication bypass vulnerability exists in Ollama platform's API endpoints in versions prior to and including v0.12.3. The platform exp…EPSS 0.71%8.8CVE-2026-7482Ollama out-of-bounds read vulnerabilityOllama before 0.17.1 contains a heap out-of-bounds read vulnerability in the GGUF model loader. The /api/create endpoint accepts an attacker-supplied…EPSS 0.71%8.8CVE-2024-37032Ollama digest validation path traversal enables remote code executionOllama before 0.1.34 fails to validate the format of the model digest (expected sha256 with 64 hex digits) when resolving the model path, so malforme…EPSS 90%analysed8.7CVE-2025-15514Ollama vulnerabilityOllama 0.11.5-rc0 through current version 0.13.5 contain a null pointer dereference vulnerability in the multi-modal model image processing functiona…EPSS 0.78%8.2CVE-2024-39720Ollama out-of-bounds read vulnerabilityAn issue was discovered in Ollama before 0.1.46. An attacker can use two HTTP requests to upload a malformed GGUF file containing just 4 bytes starti…EPSS 2.5%7.7CVE-2026-42249Ollama path traversal vulnerabilityOllama for Windows contains a Remote Code Execution vulnerability in its update mechanism due to improper handling of attacker‑controlled HTTP respon…EPSS 0.52%7.7CVE-2026-42248Ollama download of code without integrity check vulnerabilityOllama for Windows does not perform integrity or authenticity verification of downloaded update executables. Unlike other platforms, the Windows impl…EPSS 0.33%7.5CVE-2026-5757Ollama out-of-bounds read vulnerabilityUnauthenticated remote information disclosure vulnerability in Ollama's model quantization engine allows an attacker to read and exfiltrate the serve…EPSS 0.74%

Source: NIST National Vulnerability Database (record CVE-2026-15685), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.