CVE-2026-100651
- Source
- https://cve.org/CVERecord?id=CVE-2026-100651
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100651.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-100651
- Aliases
-
- GHSA-3mqx-f33v-vgp9
- Published
- 2026-09-26T13:23:21Z
- Modified
- 2026-09-29T03:30:29Z
- Severity
-
- 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- vllm before 0.29.0 Denial of Service via Decoder Prompt Length Bypass
- Details
-
vLLM before 0.29.0 fails to enforce decoder prompt-length validation on the disaggregated serving endpoint /inference/v1/generate. When the request contains a 'features' (multimodal) payload, vllm/entrypoints/serve/disagg/serving.py builds a multimodal EngineInput directly from the caller-supplied token_ids, and GenerateRequest.token_ids (vllm/entrypoints/serve/disagg/protocol.py) is not checked against model_config.max_model_len. For multimodal processors that report skip_prompt_length_check=True (for example Nemotron Parse, Whisper, and FireRedLID), InputProcessor._validate_prompt_len() returns immediately for both encoder and decoder prompts, so an overlong prompt becomes an EngineCoreRequest and reaches the worker input-batch copy into a fixed max_model_len-wide NumPy row. A client able to reach the endpoint on an affected model configuration can therefore submit an overlong token_ids list to trigger a worker failure and denial of service. Fixed in 0.29.0.
- Database specific
{ "cna_assigner": "VulnCheck", "cwe_ids": [ "CWE-400" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100651.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100651.json
- https://github.com/vllm-project/vllm/security/advisories/GHSA-3mqx-f33v-vgp9
- https://nvd.nist.gov/vuln/detail/CVE-2026-100651
- https://www.vulncheck.com/advisories/vllm-before-0.29.0-denial-of-service-via-decoder-prompt-length-bypass