What is CVE-2026-7482?
Ollama 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 GGUF file in which the declared tensor offset and size exceed the file's actual length; during quantization in fs/ggml/gguf.go and server/quantization.go (WriteTo()), the server reads past the allocated heap buffer. The leaked memory contents may include environment variables, API keys, system prompts, and concurrent users' conversation data, and can be exfiltrated by uploading the resulting model artifact through the /api/push endpoint to an attacker-controlled registry. The /api/create and /api/push endpoints have no authentication in the upstream distribution. Default deployments bind to 127.0.0.1, but the documented OLLAMA_HOST=0.0.0.0 configuration is widely used in practice (large public-internet exposure observed).
Timeline
- 2026-05-04Published to the U.S. National Vulnerability Database (NVD)
- 2026-06-17NVD record last updated
Affected product
Ollama
Remediation Steps
- Immediately disconnect or isolate affected Ollama instances from untrusted networks
- Update Ollama to the latest patched version released by the project
- Review server logs for evidence of unauthorized memory access or exfiltration
- Rotate all credentials and secrets that may have been exposed in process memory
- Implement network-level access controls restricting Ollama API access
References
- https://github.com/ollama/ollama/commit/88d57d0483cca907e0b23a968c83627a20b21047
- https://github.com/ollama/ollama/pull/14406
- https://github.com/ollama/ollama/releases/tag/v0.17.1
- https://github.com/ollama/ollama/security/advisories
- https://www.cisa.gov/news-events
- https://nvd.nist.gov/vuln/detail/CVE-2026-7482
Referenced in our briefings & reports
- Vulnerability Priority Report – Week 2 of May 2026 (May 11 – 17)
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