CVE-2026-69152

brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation

Published Aug 3, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.18, 2.1.4, 3.0.6, and 5.0.9, expand() does not apply maxLength while constructing comma-alternative intermediate arrays or padded sequences, allowing attacker-controlled input to exhaust memory or block the event loop. The fix for CVE-2026-14257 is bypassed by the vulnerability. This issue is fixed in versions 1.1.18, 2.1.4, 3.0.6, and 5.0.9.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-rgw5-rvv9-x895 brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Juliangruber
Juliangruber brace-expansion
Vendors & Products Juliangruber
Juliangruber brace-expansion
Type Values Removed Values Added
Description The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.18, 2.1.4, 3.0.6, and 5.0.9, expand() does not apply maxLength while constructing comma-alternative intermediate arrays or padded sequences, allowing attacker-controlled input to exhaust memory or block the event loop. The fix for CVE-2026-14257 is bypassed by the vulnerability. This issue is fixed in versions 1.1.18, 2.1.4, 3.0.6, and 5.0.9.
Title brace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigation
Weaknesses CWE-400
CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 3, 2026, 8:12 PM
Reserved
Aug 3, 2026, 3:47 PM
Status
Analyzed
Published
Aug 3, 2026, 5:16 PM
Modified
Oct 23, 2026, 9:10 PM
Severity
Important
Public date
Aug 3, 2026, 4:33 PM