CVE-2026-54234: vLLM remote denial of service via invalid recovered token reinjection

# CVE-2026-54234: vLLM remote denial of service via invalid recovered token reinjection

https://gcdradar.vercel.app/incidents/cve-2026-54234-vllm-remote-denial-of-service-via-invalid-rec · AIR-2026-0808 · closed 2026-07-06

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-07-06 (happened 2026-07-17)
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2026-54234
- CVSS: 7.5

## Summary

A vulnerability in vLLM allows a crafted multi-request speculative workload or gRPC sequence to trigger an out-of-vocabulary token error. This crashes the inference engine with a GPU device-side assertion failure.

## What to do

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

## Latest updates

- 2026-07-17: CVE-2026-54234: vLLM has Remote DoS via Invalid Recovered Token Reinjection (https://github.com/advisories/GHSA-8wr5-jm2h-8r4f)
- 2026-07-06: CVE-2026-54234: vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. (https://nvd.nist.gov/vuln/detail/CVE-2026-54234)

## Sources

- 2026-07-06 NVD: CVE-2026-54234: vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. https://nvd.nist.gov/vuln/detail/CVE-2026-54234
- 2026-07-17 GitHub Advisory Database: CVE-2026-54234: vLLM has Remote DoS via Invalid Recovered Token Reinjection https://github.com/advisories/GHSA-8wr5-jm2h-8r4f

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