CVE-2026-47155: vLLM artifact pin decay allows loading unpinned code and weights

# CVE-2026-47155: vLLM artifact pin decay allows loading unpinned code and weights

https://gcdradar.vercel.app/incidents/cve-2026-47155-vllm-artifact-pin-decay-allows-loading-unpinn · AIR-2026-0725 · closed 2026-06-10

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-06-10
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-47155
- CVSS: 6.5

## Summary

vLLM revision pinning controls fail to consistently apply to all loaded model artifacts, permitting pinned deployments to load unpinned code or weights. Operators are affected by this supply-chain integrity issue.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-06-22: CVE-2026-47155: vLLM is an inference and serving engine for large language models (LLMs). (https://nvd.nist.gov/vuln/detail/CVE-2026-47155)
- 2026-06-10: CVE-2026-47155: vLLM's Artifact Pin Decay allows pinned deployments to load unpinned code, weights, and processors (https://github.com/advisories/GHSA-3ww4-5jv9-j5gm)

## Sources

- 2026-06-10 GitHub Advisory Database: CVE-2026-47155: vLLM's Artifact Pin Decay allows pinned deployments to load unpinned code, weights, and processors https://github.com/advisories/GHSA-3ww4-5jv9-j5gm
- 2026-06-22 NVD: CVE-2026-47155: vLLM is an inference and serving engine for large language models (LLMs). https://nvd.nist.gov/vuln/detail/CVE-2026-47155

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.