CVE-2025-48887: vLLM ReDoS Vulnerability in pythonic_tool_parser

# CVE-2025-48887: vLLM ReDoS Vulnerability in pythonic_tool_parser

https://gcdradar.vercel.app/incidents/cve-2025-48887-vllm-redos-vulnerability-in-pythonic-tool-par · AIR-2025-0290 · closed 2025-05-28

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2025-05-28
- AI role: Attack on AI
- Products: vLLM
- CVE ids: CVE-2025-48887
- CVSS: 6.5

## Summary

A Regular Expression Denial of Service vulnerability exists in vLLM's tool parser due to complex nested regular expressions. Attackers can exploit this to cause service unavailability.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2025-05-30: CVE-2025-48887: vLLM, an inference and serving engine for large language models (LLMs), has a Regular Expression Denial of Service (ReDoS)… (https://nvd.nist.gov/vuln/detail/CVE-2025-48887)
- 2025-05-28: CVE-2025-48887: vLLM has a Regular Expression Denial of Service (ReDoS, Exponential Complexity) Vulnerability in `pythonic_tool_parser.py` (https://github.com/advisories/GHSA-w6q7-j642-7c25)

## Sources

- 2025-05-28 GitHub Advisory Database: CVE-2025-48887: vLLM has a Regular Expression Denial of Service (ReDoS, Exponential Complexity) Vulnerability in `pythonic_tool_parser.py` https://github.com/advisories/GHSA-w6q7-j642-7c25
- 2025-05-30 NVD: CVE-2025-48887: vLLM, an inference and serving engine for large language models (LLMs), has a Regular Expression Denial of Service (ReDoS)… https://nvd.nist.gov/vuln/detail/CVE-2025-48887

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.