vLLM: Flash late-interaction scoring caches query embeddings under a caller-controlled request id — cross-request integrity break and induced errors on `/score` and `/rerank`

[ Description ]Official description

vLLM is an inference and serving engine for large language models. Prior to 0.30.0, flash late-interaction scoring at the /score and /rerank endpoints derives each worker's query_key value from the caller-controlled X-Request-Id header. A concurrent request that reuses a victim's identifier can overwrite the cached query embedding so the victim's documents are scored against the attacker's query, and shared use counters can also cause a late-interaction cache-miss error. This issue is fixed in version 0.30.0.

[ Fixes ]Fixes and patches

• vllm 0.30.0Fixed version · GitHub Advisories · pip package vllm: upgrade to 0.30.0 or later (affected < 0.30.0)
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• BSI CERT-Bund23 Sep 2026WID-SEC-2026-3564

  vllm: Multiple vulnerabilities Translated from German

  CVE-2026-105757CVE-2026-105754CVE-2026-105755+1 more CVEs

[ Packages ]Affected open-source packages

• vllm pipAffected < 0.30.0 · fixed in 0.30.0 · GHSA-2phq-3phc-84px

[ References ]References

• github.com/vllm-project/vllm/commit/ee17d0d869203ef9a35ad73358a4987bba14b1fcPatch
• github.com/vllm-project/vllm/pull/51445Issue TrackingPatch
• github.com/vllm-project/vllm/releases/tag/v0.30.0Release Notes
• github.com/vllm-project/vllm/security/advisories/GHSA-2phq-3phc-84pxVendor Advisory