CVE-2025-62426
- Source
- https://cve.org/CVERecord?id=CVE-2025-62426
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-62426.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-62426
- Aliases
- Downstream
- Related
- Published
- 2025-11-21T01:21:29Z
- Modified
- 2026-08-12T03:51:26Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- vLLM vulnerable to DoS via large Chat Completion or Tokenization requests with specially crafted `chat_template_kwargs`
- Details
-
vLLM is an inference and serving engine for large language models (LLMs). From version 0.5.5 to before 0.11.1, the /v1/chat/completions and /tokenize endpoints allow a chat_template_kwargs request parameter that is used in the code before it is properly validated against the chat template. With the right chat_template_kwargs parameters, it is possible to block processing of the API server for long periods of time, delaying all other requests. This issue has been patched in version 0.11.1.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-770" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62426.json" }- References
-
- https://github.com/vllm-project/vllm/blob/2a6dc67eb520ddb9c4138d8b35ed6fe6226997fb/vllm/entrypoints/chat_utils.py#L1602-L1610
- https://github.com/vllm-project/vllm/blob/2a6dc67eb520ddb9c4138d8b35ed6fe6226997fb/vllm/entrypoints/openai/serving_engine.py#L809-L814
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62426.json
- https://github.com/vllm-project/vllm/security/advisories/GHSA-69j4-grxj-j64p
- https://nvd.nist.gov/vuln/detail/CVE-2025-62426
- https://github.com/vllm-project/vllm/commit/3ada34f9cb4d1af763fdfa3b481862a93eb6bd2b
- https://github.com/vllm-project/vllm/pull/27205
Affected packages
Git / github.com/vllm-project/vllm
Affected ranges
- Type
- GIT
- Repo
- https://github.com/vllm-project/vllm
- Events
- Database specific
-
Show details
{ "cpe": [ "cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*", "cpe:2.3:a:vllm:vllm:0.11.1:rc0:*:*:*:*:*:*", "cpe:2.3:a:vllm:vllm:0.11.1:rc1:*:*:*:*:*:*" ], "extracted_events": [ { "introduced": "0.5.5" }, { "fixed": "0.11.1" }, { "introduced": "0.11.1-rc0" }, { "last_affected": "0.11.1-rc0" }, { "introduced": "0.11.1-rc1" }, { "last_affected": "0.11.1-rc1" } ], "source": [ "CPE_RANGE", "CPE_STRING", "REFERENCES" ] }