Heap Out-of-Bounds Read Vulnerability in Ollama by Ollama

CVE-2026-7482

What is CVE-2026-7482?

CVE-2026-7482 is a critical heap out-of-bounds read vulnerability found in the Ollama software created by Ollama. This software is primarily used for managing and running machine learning models. The vulnerability exists in the handling of GGUF model files within the application, specifically at the API endpoints for model creation. Attackers can exploit this vulnerability by submitting specially crafted GGUF files, where the parameters supplied exceed the actual length of the file. This results in the server reading beyond the allocated memory buffer, potentially leaking sensitive information stored in memory.

The implications for organizations utilizing this software are severe. Since the compromised data may include sensitive details like API keys and environment variables, attackers can leverage this information to gain unauthorized access to systems, exfiltrate data, or conduct further attacks. Moreover, as the vulnerable endpoints lack authentication, this issue exacerbates the risk, especially if the default configurations are deployed, making the service accessible over the internet.

Potential impact of CVE-2026-7482

1. Data Exfiltration: The vulnerability allows attackers to access sensitive data, including environment variables and API keys, which can be used for unauthorized access to internal systems or third-party services.

2. Increased Attack Surface: With the lack of authentication on critical API endpoints, any exposed instance of Ollama could be targeted by malicious actors. This increases the overall risk for organizations, especially those using default configurations that may inadvertently expose their instances to the internet.

3. Threat of Model Manipulation: Attackers could potentially upload the manipulated model artifacts back to an attacker-controlled registry through the vulnerable API, enabling them to further engineer attacks against the organization or disrupt the functionality of the Ollama software.

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