Vulnerability Description
vLLM, an inference and serving engine for large language models (LLMs), has a Regular Expression Denial of Service (ReDoS) vulnerability in the file `vllm/entrypoints/openai/tool_parsers/pythonic_tool_parser.py` of versions 0.6.4 up to but excluding 0.9.0. The root cause is the use of a highly complex and nested regular expression for tool call detection, which can be exploited by an attacker to cause severe performance degradation or make the service unavailable. The pattern contains multiple nested quantifiers, optional groups, and inner repetitions which make it vulnerable to catastrophic backtracking. Version 0.9.0 contains a patch for the issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vllm | Vllm | >= 0.6.4, < 0.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/vllm-project/vllm/commit/4fc1bf813ad80172c1db31264beaef7d93fePatch
- https://github.com/vllm-project/vllm/pull/18454Issue TrackingPatch
- https://github.com/vllm-project/vllm/security/advisories/GHSA-w6q7-j642-7c25ExploitVendor Advisory
- https://github.com/vllm-project/vllm/security/advisories/GHSA-w6q7-j642-7c25ExploitVendor Advisory
FAQ
What is CVE-2025-48887?
CVE-2025-48887 is a vulnerability with a CVSS score of 6.5 (MEDIUM). vLLM, an inference and serving engine for large language models (LLMs), has a Regular Expression Denial of Service (ReDoS) vulnerability in the file `vllm/entrypoints/openai/tool_parsers/pythonic_tool...
How severe is CVE-2025-48887?
CVE-2025-48887 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-48887?
Check the references section above for vendor advisories and patch information. Affected products include: Vllm Vllm.