Critical Out-of-Bounds Read Vulnerability in Ollama Exposes Process Memory
Researchers have revealed a critical out-of-bounds read vulnerability in Ollama that could enable remote, unauthenticated attackers to leak its entire process memory. The vulnerability, tracked as CVE-2026-7482 and dubbed Bleeding Llama, carries a high CVSS score of 9.1 and is estimated to impact over 300,000 globally deployed servers.
What happened
Cybersecurity researchers identified a severe out-of-bounds read vulnerability in Ollama, a widely deployed software product. This flaw allows an attacker to remotely and without authentication read beyond the intended memory boundaries of the process, potentially exposing all memory contents. The vulnerability has been assigned the identifier CVE-2026-7482 and has received a CVSS score of 9.1, reflecting its critical severity level.
Dubbed Bleeding Llama by Cyera, the flaw likely affects over 300,000 servers worldwide that run the Ollama software, revealing the extensive scale of potential exposure. The disclosure highlights the risks posed by memory access bugs within server applications.
Why it matters
Memory leaks caused by out-of-bounds reads can reveal sensitive information residing in process memory such as credentials, encryption keys, and other confidential data. The ability for a remote and unauthenticated attacker to access this information increases the risk of wider compromise and data exfiltration.
Given Ollama's deployment scale, this vulnerability presents a significant threat to organizations relying on it, demanding immediate attention to avoid exploitation. Public recognition and scoring of this issue underscore the importance of timely mitigation.
What security teams should do
Security teams managing Ollama deployments should prioritize reviewing available vendor advisories and applying any security patches or updates addressing CVE-2026-7482. If patches are not yet available, organizations should consider containment measures such as restricting network exposure of vulnerably hosted services.
Monitoring for unusual outbound traffic or access patterns to vulnerable instances may help detect exploitation attempts. A thorough review of sensitive data potentially exposed through the process memory can inform incident response actions.
Key technical details
The vulnerability is an out-of-bounds read condition within the Ollama process, which enables unauthorized reading beyond allocated memory boundaries. This flaw leads to a remote memory leak, exposing the entire process's memory contents to an attacker.
The CVE identifier assigned is CVE-2026-7482, and the severity rating is high, with a CVSS base score of 9.1. The vulnerability was discovered and named Bleeding Llama by Cyera. No further technical exploitation details or mitigation specifics were provided in the disclosure.
Affected organizations/products
The vulnerability impacts Ollama software deployments, with estimates indicating more than 300,000 servers globally may be affected. No specific versions or configurations were detailed in the source information.
Source attribution
https://thehackernews.com/2026/05/ollama-out-of-bounds-read-vulnerability.html
