GHSA-vfm7-4h43-gp6m: Duplicate Advisory Denial of Service Vulnerability

MODERATE
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CVSS 4.3
CWE-1333
Published
Advisory Summary

GHSA-vfm7-4h43-gp6m is a MODERATE (CVSS 4.3) denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Duplicate Advisory libraries in the PyPI ecosystem. The issue involves vllm vulnerable to regular expression denial of service. Remediation is available by upgrading affected packages to version 0.9.0.

GHSA-vfm7-4h43-gp6m at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-vfm7-4h43-gp6m
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Duplicate Advisory
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 4.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix GHSA-vfm7-4h43-gp6m

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

vllm fixed: 0.9.0 
pip install vllm>=0.9.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show vllm

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-vfm7-4h43-gp6m, inspect your installed packages using pip:

pip show vllm

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.9.0), your application is affected.

Note: The pip show vllm command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-j828-28rj-hfhp. This link is maintained to preserve external references. ### Original Description 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.

GHSA-vfm7-4h43-gp6m Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
0.9.0
Product / Package Ecosystem Affected Versions Fixed Version
vllm
pypi/vllm
PyPI
≥ 0.6.3
< 0.9.0
0.9.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp
NVD — GHSA-vfm7-4h43-gp6m NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71379
Duplicate Advisory Source Repository REPOSITORY
https://github.com/vllm-project/vllm
www.vulncheck.com/advisories/vllm-reg... WEB
https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components

Frequently Asked Questions

What is GHSA-vfm7-4h43-gp6m?
GHSA-vfm7-4h43-gp6m is a security vulnerability in Duplicate Advisory involving vLLM Vulnerable to Regular Expression Denial of Service under CWE-1333: Inefficient Regular Expression Complexity.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to 0.9.0 across affected packages: vllm.
What version fixes GHSA-vfm7-4h43-gp6m?
Upgrading to 0.9.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vllm affected?
Yes, vllm is affected in releases prior to 0.9.0. Upgrade your dependency to 0.9.0 or later.
What is the CVSS score of GHSA-vfm7-4h43-gp6m?
GHSA-vfm7-4h43-gp6m has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with GHSA-vfm7-4h43-gp6m?
GHSA-vfm7-4h43-gp6m is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check PyPI dependencies for GHSA-vfm7-4h43-gp6m?
Run the dependency tree command: 'pip show vllm'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vfm7-4h43-gp6m",
  "modified" : "2026-09-11T15:45:35Z",
  "published" : "2026-06-20T21:31:21Z",
  "withdrawn" : "2026-09-11T15:45:34Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: vLLM Vulnerable to Regular Expression Denial of Service",
  "details" : "### Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-j828-28rj-hfhp. This link is maintained to preserve external references.\n\n### Original Description\n\nvLLM 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "vllm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.6.3"
      }, {
        "fixed" : "0.9.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-71379"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vllm-project/vllm"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-11T15:45:34Z",
    "nvd_published_at" : "2026-06-20T19:16:23Z"
  }
}