Bug 2560391 (CVE-2026-116174)

Summary: CVE-2026-116174 vllm: vllm: Denial of Service via invalid prompt token IDs in gRPC service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: alinfoot, bbrownin, dtrifiro, mwoodson, weaton
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in vLLM. A remote attacker can trigger a Denial of Service (DoS) by submitting requests containing out-of-bounds token identifiers to the gRPC service. Because the application fails to validate pre-tokenized input against the model vocabulary before processing, handling these invalid values causes the core engine to terminate unexpectedly and leaves the server unavailable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-25 13:31:41 UTC
vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC Generate and GenerateStream service that forwards unchecked prompt token IDs to EngineCore. Attackers can submit requests with out-of-vocabulary prompt.token_ids values to trigger a fatal embedding lookup failure that terminates EngineCore and leaves the server unhealthy.