vLLMPYSEC-2026-3996
vLLM through 0.29.0 fails to properly clean up decode-side metadata for...
UnratedCVE-2026-93436 · Published Sep 17, 2026 · updated Sep 29, 2026
vLLM through 0.29.0 fails to properly clean up decode-side metadata for rejected inference requests in prefill/decode disaggregated deployments. Remote attackers can submit requests with max_tokens=0 to exhaust decode-worker memory without bound until the worker restarts.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| vllm PyPI | < 0.30.0 | 0.30.0 |
Details and references
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Severity from
- no source yet
- Also known as
- CVE-2026-93436
More vLLM advisories
All vLLM| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 19 | vLLM through 0.29.0 fails to properly validate bad_words token indices against... Medium4.3Sep 19 | Medium4.3 | 0.30.0 |
| Sep 18 | vLLM: memory corruptionMedium5.3Sep 18 | Medium5.3 | 0.30.0 |
| Sep 18 | vLLM before 0.29.0 validates allowed_token_ids against tokenizer length instead...Medium5.3Sep 18 | Medium5.3 | 0.29.0 |
| Sep 18 | vLLM: unauthenticated attacker could crash the engineUnratedSep 18 | Unrated | 0.28.0 |
| Sep 17 | vLLM: Request-selected PyNvVideoCodec GPU decode bypasses static VRAM reservationMedium6.5Sep 17 | Medium6.5 | 0.28.0 |
| Sep 16 | vLLM: Unauthenticated audio decompression-bomb DoS in /v1/chat/completionsMedium6.5Sep 16 | Medium6.5 | 0.24.0 |