What’s Vulnerable › Vulnerabilities

CVE-2026-47155: vLLM: Artifact Pin Decay in vLLM allows pinned deployments to load unpinned code, weights, and processors

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-22 · updated 2026-10-25
• Weakness: CWE-345

Description

vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.22.0, vLLM's revision pinning controls do not consistently apply to all artifacts loaded for a model. A deployment that supplies --revision or --code-revision can still load dynamic code, GGUF files, image processors, retrieval side weights, or same-repository subfolder weights/config from an unpinned/default revision. This is a supply-chain integrity issue for pinned vLLM deployments. Operators can believe they are serving a reviewed model revision while vLLM resolves behavior-affecting nested or sibling artifacts outside that reviewed revision. This vulnerability is fixed in 0.22.0.

Affected products

• vllm-project vllm: before 0.22.0 — fixed in 0.22.0

How to fix

Upgrade to a fixed version: vllm-project vllm 0.22.0. Check the vendor advisory for mitigations.

References

• https://github.com/vllm-project/vllm/commit/d26a28ab033697f55a1414b5b0435de7cd6045b6
• https://github.com/vllm-project/vllm/pull/42616
• https://github.com/vllm-project/vllm/security/advisories/GHSA-3ww4-5jv9-j5gm
• https://huntr.com/bounties/3f1e24c0-87d2-4f6c-a705-820f380879ac

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