CVE-2026-47155 vLLM: Artifact Pin Decay in vLLM allows pinned deployments to load unpinned code, weights, and processors
Attackers can inject malicious code or weights into pinned vLLM deployments by exploiting inconsistent revision pinning for nested artifacts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47155?
CVE-2026-47155 is a medium-severity vulnerability in Vllm Vllm, published on 22 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-345
Which versions are affected by CVE-2026-47155?
3 open source packages ship an affected version, including vllm. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vllm PyPI | All versions | 0.22.0 |
vllm PyPI | All versions | 0.22.0 |
vllm PyPI | All versions | 0.22.0 |
Products include Vllm Vllm.
How do I fix CVE-2026-47155?
Upgrade vllm to 0.22.0 or later.
Is CVE-2026-47155 being exploited?
There is no known exploitation of CVE-2026-47155 in the wild and no public exploit code.
Other vulnerabilities in Vllm Vllm
- CVE-2025-32444 vLLM Vulnerable to Remote Code Execution via Mooncake Integration
- CVE-2026-22778 vLLM leaks a heap address when PIL throws an error
- CVE-2025-47277 vLLM Allows Remote Code Execution via PyNcclPipe Communication Service
- CVE-2024-11041 Remote Code Execution in vllm-project/vllm
- CVE-2026-48746 vLLM: OpenAI auth bypass
Sources
Also known as GHSA-3ww4-5jv9-j5gm, MINI-265m-796r-j4h6, MINI-4gx2-8qxv-64x8, MINI-9m3h-gjv4-v4j8, PYSEC-2026-2301.