23 Oct 2026 15:48:27 UTC
vLLM through 0.29.0 Denial of Service via NIXL Multi-Prompt Assertion Failure
cve-program · CVE-2026-94623 · Published
CVE-2026-94623
vLLM through 0.29.0 Denial of Service via NIXL Multi-Prompt Assertion Failure
CVSS 4.0 8.7 HIGHCVSS 3.1 7.5 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-94623
PublishedvLLM through 0.29.0 contains a denial of service vulnerability in the NIXL connector's prefix caching implementation that fails to properly validate block counts across multi-prompt completion requests in prefill/decode disaggregated deployments. Attackers can trigger an assertion failure in NixlBaseConnectorWorker._apply_prefix_caching by submitting completion requests with multiple prompts of varying lengths, causing the decode worker to terminate and become unavailable until restarted.
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