| Component | vLLM |
| Severity | medium (CVSS 5.3) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| Published (NVD) | 2026-05-26 |
| Last modified | 2026-07-23 |
| Affected versions | not published yet, see the advisory |
| Fixed in | see the vendor advisory |
| Weakness | CWE-404 |
| CISA KEV | not listed |
NVD description
A vulnerability was identified in vllm-project vllm 0.19.0. This issue affects some unknown processing of the component OpenAI-compatible Serving Path. Such manipulation leads to denial of service. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The pull request to fix this issue awaits acceptance.
What to do
- NVD lists no fixed version yet: follow the vendor advisory below and keep vLLM off the public internet until a fix ships.
- Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-9540
- https://github.com/vllm-project/vllm/
- https://github.com/vllm-project/vllm/issues/37343
- https://github.com/vllm-project/vllm/pull/37594
- https://ingero.io/debugging-vllm-latency-minimax-ollama-mcp/
- https://vuldb.com/submit/814645
- https://vuldb.com/vuln/365601
- https://vuldb.com/vuln/365601/cti
Read more
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