Ollama 0.7.1 Download Blob downloadBlob array index

Summaryinfo

A vulnerability labeled as problematic has been found in Ollama 0.7.1. This impacts the function downloadBlob of the component Download Blob. Executing a manipulation can lead to array index. This vulnerability appears as CVE-2026-15685. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Ollama 0.7.1. It has been declared as problematic. This vulnerability affects the function downloadBlob of the component Download Blob. The manipulation with an unknown input leads to a array index vulnerability. The CWE definition for the vulnerability is CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. As an impact it is known to affect availability. CVE summarizes:

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 advisory is available at zerodayinitiative.com. This vulnerability was named CVE-2026-15685 since 07/13/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/14/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Ollama

Version

• 0.7.1

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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