CVE-2026-45149

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-jxxr-4gwj-5jf2	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:juliangruber:brace-expansion:*:*:*:*:*:node.js:*:*

History

03 Jun 2026, 20:13

Type	Values Removed	Values Added
CPE		cpe:2.3:a:juliangruber:brace-expansion::::::node.js::*
References	~~() https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-jxxr-4gwj-5jf2 -~~	() https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-jxxr-4gwj-5jf2 - Mitigation, Vendor Advisory
First Time		Juliangruber brace-expansion Juliangruber

29 May 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-29 20:16

Updated : 2026-06-12 18:38

NVD link : CVE-2026-45149

Mitre link : CVE-2026-45149

CVE.ORG link : CVE-2026-45149

JSON object : View

Products Affected

juliangruber

brace-expansion

CWE

CWE-400

Uncontrolled Resource Consumption

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