CVE-2026-25547

brace-expansion: brace-expansion: Denial of Service via unbounded brace range expansion

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · February 5, 2026

Updated · July 3, 2026

Description

A flaw was found in the brace-expansion component. This denial of service (DoS) vulnerability allows a remote attacker to provide specially crafted input containing repeated numeric brace ranges. This input causes the library to attempt an unbounded expansion, consuming excessive CPU and memory resources. This can lead to a system crash, impacting the availability of the service.

Statement

Exploitation of this flaw requires that a user or service processes untrusted input.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-409 · Improper Handling of Highly Compressed Data (Data Amplification)