CVE-2026-114049: Expected Behavior Violation in vllm-project vllm
Description
vLLM before 0.31.0 contains a cross-request mask leak in InputBatch.condense() that allows remote attackers to constrain other clients' outputs by leaving stale allowed_token_ids rows. Attackers can submit concurrent constrained generate requests, including via unauthenticated /invocations, so recycled batch slots apply their token allowlist to victims' unrestricted requests.
CVSS v4.0
Score 6.3medium
Affected software
vllm-project
vllm
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-20T21:41:06.180Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad80bff2cdf04f6568caa12
Added to database: 10/21/2026, 00:49:03 UTC
Last updated: 10/21/2026, 00:49:03 UTC
Views: 1
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