Description
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. From 5.0.0 to before 5.0.6, the max option was being applied too late. When expanding a single large numeric range like {1..10000000}, the sequence generation loop generates all 10 million intermediate elements before the max limit is applied With max=10, the output is correctly limited to 10 items, but the process still allocates ~505 MB and spends ~800ms building the full intermediate array. This vulnerability is fixed in 5.0.6.
Published: 2026-05-29
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-jxxr-4gwj-5jf2 brace-expansion: Large numeric range defeats documented `max` DoS protection
History

Tue, 16 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 03 Jun 2026 20:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:juliangruber:brace-expansion:*:*:*:*:*:node.js:*:*

Mon, 01 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 29 May 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Juliangruber
Juliangruber brace-expansion
Vendors & Products Juliangruber
Juliangruber brace-expansion

Fri, 29 May 2026 20:15:00 +0000

Type Values Removed Values Added
Description The brace-expansion library generates arbitrary strings containing a common prefix and suffix. From 5.0.0 to before 5.0.6, the max option was being applied too late. When expanding a single large numeric range like {1..10000000}, the sequence generation loop generates all 10 million intermediate elements before the max limit is applied With max=10, the output is correctly limited to 10 items, but the process still allocates ~505 MB and spends ~800ms building the full intermediate array. This vulnerability is fixed in 5.0.6.
Title brace-expansion: Large numeric range defeats documented `max` DoS protection
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


Subscriptions

Juliangruber Brace-expansion
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-01T16:44:23.371Z

Reserved: 2026-05-08T20:44:38.964Z

Link: CVE-2026-45149

cve-icon Vulnrichment

Updated: 2026-06-01T16:44:17.118Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-29T20:16:25.550

Modified: 2026-06-12T18:38:01.507

Link: CVE-2026-45149

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-29T19:55:07Z

Links: CVE-2026-45149 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-18T04:00:15Z

Weaknesses