---
id: CVE-2026-102278
title: >-
  The brace-expansion library generates arbitrary strings containing a common
  prefix and suffix
summary: >-
  The brace-expansion library generates arbitrary strings containing a common
  prefix and suffix. Prior to 1.1.20, 2.1.6, 3.0.8, and 5.0.11, deeply nested
  brace groups cause expand_() to recurse once per nesting level at comma-member
  and si…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-674
vendor: juliangruber
product: brace-expansion
affected:
  - 'brace-expansion >= 4.0.0, < 5.0.11'
  - 'brace-expansion >= 3.0.0, < 3.0.8'
  - 'brace-expansion >= 2.0.0, < 2.1.6'
  - brace-expansion < 1.1.20
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T21:17:16.517'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102278'
references:
  - url: >-
      https://github.com/juliangruber/brace-expansion/commit/1efee7c397c191da6287a78ec19512476a966a7b
    label: security-advisories@github.com
  - url: >-
      https://github.com/juliangruber/brace-expansion/commit/935d78f32f335b2ff76578e5c5e877d31ae9888c
    label: security-advisories@github.com
  - url: >-
      https://github.com/juliangruber/brace-expansion/commit/de84f144e9816f30e25fc8179e2e1249ab6df0db
    label: security-advisories@github.com
  - url: >-
      https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-qhr7-859c-m2p7
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-28T21:20:54.784Z'
---

## Overview

The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.20, 2.1.6, 3.0.8, and 5.0.11, deeply nested brace groups cause expand_() to recurse once per nesting level at comma-member and single-set expansion sites, exhausting the native stack before output limits can apply and potentially terminating the Node.js process. expand_ performs uncontrolled recursion for nested brace alternatives and single-part sets. deeply nested brace groups supplied as an untrusted pattern. expand_ is affected. expand is affected. Comma members is affected. Single set is affected. native stack exhaustion during nested sub-expansion. process-terminating denial of service. This issue is fixed in versions 1.1.20, 2.1.6, 3.0.8, and 5.0.11.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.