CVE-2026-126398
vLLM 0.28.0 before 0.30.0 Denial of Service via Prompt Embeds on XD-RoPE Models
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
vLLM from 0.28.0 before 0.30.0 contains a reachable assertion vulnerability in GPUModelRunner._init_xdrope_positions that allows remote attackers to crash the engine by submitting embeddings-only requests. Attackers can send a /v1/completions request containing only prompt_embeds to XD-RoPE models with --enable-prompt-embeds, terminating the EngineCore and API server for all clients.
| CWE | CWE-617 |
| Vendor | vllm-project |
| Product | vllm |
| Published | Nov 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for vllm-project vllm
Be the first to know when new medium vulnerabilities affecting vllm-project vllm are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
vllm-project / vllm
0.28.0 < 0.30.0
References
Credits
🔍 wildoranges jperezdealgaba