What is CVE-2025-5889?

CVE-2025-5889 is a low-severity vulnerability in Juliangruber Brace-Expansion, classified under Uncontrolled Resource Consumption. CVSS score: 3.1/10. Published 2025-06-09.

How severe is CVE-2025-5889?

Low severity. CVSS v3 base score is 3.1 out of 10.

Is CVE-2025-5889 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Juliangruber Brace-Expansion

CVE-2025-5889

A vulnerability was found in juliangruber brace-expansion up to 1.1.11/2.0.1/3.0.0/4.0.0. It has been rated as problematic. Affected by this issue is the function expand of the file index.js. The manipulation leads to inefficient regular expression complexity. The attack may be launched remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 1.1.12, 2.0.2, 3.0.1 and 4.0.1 is able to address this issue. The name of the patch is a5b98a4f30d7813266b221435e1eaaf25a1b0ac5. It is recommended to upgrade the affected component.

Vulnerability class: DoS (Denial of Service)

Published 2025-06-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.006 (47.3th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Juliangruber Brace-Expansion — versions 1.1.0, 1.1.1, 1.1.2

Weakness classification (CWE)

Public proof-of-concept exploits

References

vuldb.com/ (technical-description, vdb-entry)
vuldb.com/ (signature, permissions-required)
vuldb.com/ (third-party-advisory)
gist.github.com/mmmsssttt404/37a40ce7d6e5ca604858fe30814d9466 (exploit)
github.com/juliangruber/brace-expansion/pull/65/commits/a5b98a4f30d7813266b2214… (issue-tracking, patch)
github.com/juliangruber/brace-expansion/releases/tag/v4.0.1 (patch)

Frequently asked questions

What is CVE-2025-5889?: CVE-2025-5889 is a low-severity vulnerability in Juliangruber Brace-Expansion, classified under Uncontrolled Resource Consumption. CVSS score: 3.1/10. Published 2025-06-09.
How severe is CVE-2025-5889?: Low severity. CVSS v3 base score is 3.1 out of 10.
Is CVE-2025-5889 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.