Staging Environment: Content and features may be unstable or change without notice.
Advisory details: pypa / vllm/PYSEC-2026-2301
Advisory ID pypa/vllm/PYSEC-2026-2301
Aliases CVE-2026-47155
GHSA-3ww4-5jv9-j5gm
PYSEC-2026-2301
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv3.1 6.5 https://github.com/pypa/advisory-database/blob/main/vulns/vllm/PYSEC-2026-2301.yaml
Reference id Reference type URL
https://github.com/vllm-project/vllm/security/advisories/GHSA-3ww4-5jv9-j5gm
3f1e24c0-87d2-4f6c-a705-820f380879ac Other https://huntr.com/bounties/3f1e24c0-87d2-4f6c-a705-820f380879ac
42616 Other https://github.com/vllm-project/vllm/pull/42616
d26a28ab033697f55a1414b5b0435de7cd6045b6 Other https://github.com/vllm-project/vllm/commit/d26a28ab033697f55a1414b5b0435de7cd6045b6
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N Found at https://github.com/pypa/advisory-database/blob/main/vulns/vllm/PYSEC-2026-2301.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-23T12:34:39Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/47xxx/CVE-2026-47155.json

Source Advisory: vulnrichment/CVE-2026-47155

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]