CVE-2025-71379
vllm - Regular Expression Denial of Service in Multiple Components
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.
Fixes and workarounds
Fix
vllm (PyPI): OSV reports a fixed version 0.9.0. Check the advisory for supported release branches.
Source: OSV GHSA-j828-28rj-hfhpAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| vllm vllm vllm
pypi |
≥ 0.6.3; < 0.9.0 (affected, semver) 0.9.0 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
vllmvllm
PyPI |
0.6.3 (affected, PyPI) 0.6.3.post1 (affected, PyPI) 0.6.4 (affected, PyPI) 0.6.4.post1 (affected, PyPI) 0.6.5 (affected, PyPI) 0.6.6 (affected, PyPI) 0.6.6.post1 (affected, PyPI) 0.7.0 (affected, PyPI) 0.7.1 (affected, PyPI) 0.7.2 (affected, PyPI) 0.7.3 (affected, PyPI) 0.8.0 (affected, PyPI) 0.8.1 (affected, PyPI) 0.8.2 (affected, PyPI) 0.8.3 (affected, PyPI) 0.8.4 (affected, PyPI) 0.8.5 (affected, PyPI) 0.8.5.post1 (affected, PyPI) Ecosystem version events: introduced 0.6.3; fixed 0.9.0 Source events (ECOSYSTEM)Other versions: unaffected |
OSV GHSA-j828-28rj-hfhp |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 4.3 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhpCNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-componentsCNA: VulnCheck · third-party-advisory
- https://github.com/advisories/GHSA-j828-28rj-hfhpOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-j828-28rj-hfhpOSV / GitHub Security Advisories · osv
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