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CVE-2026-7482 – Heap out-of-bounds read in Ollama GGUF model loader

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Summary

CVE-2026-7482 is a high/critical vulnerability in Ollama (model server) prior to v0.17.1. A crafted GGUF model file can trigger a heap out-of-bounds read in the GGUF model loader during quantization, allowing an attacker to read sensitive memory and exfiltrate it via the product’s model-push functionality.

Affected software

  • Ollama versions prior to 0.17.1 (i.e., all releases before the fix in v0.17.1).

Mitigation and recommendations

  • Immediate action: upgrade Ollama to v0.17.1 (or later) which contains the upstream fix.
  • Short-term mitigations if patching is delayed:
    • Restrict network access to Ollama management endpoints (bind to localhost, firewall rules, or use a reverse proxy with authentication and allowlisting).
    • Do not expose Ollama’s API endpoints directly to the public Internet.
    • Monitor outbound uploads from Ollama for suspicious pushes to unknown registries.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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