CVE-2026-14257

CVE Details

Release Date:	2026-07-23
Impact:	Important	What is this?

Description

brace-expansion through 5.0.7 is vulnerable to denial of service via memory exhaustion. The expand() function limits the number of results with a max option (default 100,000) but does not bound the length of each result string. By chaining multiple brace groups, an attacker keeps the result count under the limit while making each result progressively longer, so total memory scales with both count and string length until the process hits a fatal, uncatchable out-of-memory error. About 7.5 KB of input ('{a,b}'.repeat(1500)) crashes a default Node.js process. Any application that passes attacker-influenced strings to brace-expansion.expand() - directly or transitively via minimatch / glob brace patterns - can be crashed by a small request. Fixed in 5.0.8 by adding a maxLength option (default 4,000,000) that bounds accumulated output and intermediate arrays.

See more information about CVE-2026-14257 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	7.5
Vector String:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Version:	3.1
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (nodejs)	ELSA-2026-54371	2026-08-14
Oracle Linux version 8 (nodejs)	ELSA-2026-54530	2026-08-14
Oracle Linux version 8 (nodejs-nodemon)	ELSA-2026-54371	2026-08-14
Oracle Linux version 8 (nodejs-nodemon)	ELSA-2026-54530	2026-08-14
Oracle Linux version 8 (nodejs-packaging)	ELSA-2026-54371	2026-08-14
Oracle Linux version 8 (nodejs-packaging)	ELSA-2026-54530	2026-08-14