CVE-2025-71379

vLLM versions >= 0.6.3 and < 0.9.0 contain multiple regular expression denial of service (ReDoS) vulnerabilities. Several regex patterns — in vllm/lora/utils.py, the phi4mini tool parser, and the OpenAI-compatible serving chat endpoint — are susceptible to catastrophic backtracking. An attacker submitting crafted input with nested or repeated structures can trigger severe CPU consumption and performance degradation, resulting in denial of service.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp	Exploit Vendor Advisory
https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-20 19:16

Updated : 2026-06-26 20:25

NVD link : CVE-2025-71379

Mitre link : CVE-2025-71379

CVE.ORG link : CVE-2025-71379

JSON object : View

Products Affected

vllm

vllm

CWE

CWE-1333

Inefficient Regular Expression Complexity

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