Vulnerability · Published Oct 6, 2026 · Assigned by VulDB
CVE-2026-105922vllm-project vLLM Penalty utils.py get_token_bin_counts_and_mask denial of service
Medium 4.3
In plain English
A medium-severity security flaw in vLLM from vllm-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A security flaw has been discovered in vllm-project vLLM up to 0.31.0. This impacts the function get_token_bin_counts_and_mask of the file vllm/model_executor/layers/utils.py of the component Penalty Handler. Performing a manipulation results in denial of service. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | vllm | 0.32.0 | PYSEC-2026-4319 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| vllm-project | vLLM | 0.10.20.30.40.50.60.70.8 |
Weakness: CWE-404 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
References
- VDB-413896 | vllm-project vLLM Penalty utils.py get_token_bin_counts_and_mask denial of service vdb-entry, technical-description
- VDB-413896 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
- CVE-2026-105922 | CVE Analysis and Report third-party-advisory
- Submit #992707 | vLLM Project vLLM 0.27.1 Denial of Service third-party-advisory
- https://github.com/vllm-project/vllm/issues/57719 issue-tracking
- https://gist.github.com/Yunzez/5c70a3bb328eaf6d646b9d31e879dc4a#file-repro_prompt_embeds_penalties_engine_crash-py exploit
- https://github.com/vllm-project/vllm/ product