Vulnerability · Published Feb 4, 2026 · Assigned by GitHub_M
CVE-2026-25547Uncontrolled Resource Consumption in @isaacs/brace-expansion
Critical 9.2
In plain English
A critical-severity regular-expression denial of service in brace-expansion from isaacs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
@isaacs/brace-expansion is a hybrid CJS/ESM TypeScript fork of brace-expansion. Prior to version 5.0.1, @isaacs/brace-expansion is vulnerable to a denial of service (DoS) issue caused by unbounded brace range expansion. When an attacker provides a pattern containing repeated numeric brace ranges, the library attempts to eagerly generate every possible combination synchronously. Because the expansion grows exponentially, even a small input can consume excessive CPU and memory and may crash the Node.js process. This issue has been patched in version 5.0.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | nodejs | 1:22.22.2-1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs | 1:24.14.1-2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| AlmaLinux:8 | nodejs-devel | 1:22.22.2-1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-devel | 1:24.14.1-2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| AlmaLinux:10 | nodejs-docs | 1:22.22.2-1.el10_1 | ALSA-2026:7080 |
| AlmaLinux:8 | nodejs-docs | 1:22.22.2-1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-docs | 1:24.14.1-2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| AlmaLinux:8 | nodejs-full-i18n | 1:22.22.2-1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-full-i18n | 1:24.14.1-2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| AlmaLinux:8 | nodejs-libs | 1:22.22.2-1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-libs | 1:24.14.1-2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| AlmaLinux:8 | nodejs-nodemon | 3.0.1-1.module_el8.10.0+4006+3c416519 | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-nodemon | 3.0.3-3.module_el9.7.0+209+ecf6523e | ALSA-2026:7350 |
| AlmaLinux:8 | nodejs-packaging | 2021.06-6.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-packaging | 2021.06-6.module_el9.7.0+209+ecf6523e | ALSA-2026:7350 |
| AlmaLinux:8 | nodejs-packaging-bundler | 2021.06-6.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | nodejs-packaging-bundler | 2021.06-6.module_el9.7.0+198+8bf605ba | ALSA-2026:7350 |
| AlmaLinux:10 | nodejs24-docs | 1:24.14.1-2.el10_1 | ALSA-2026:7675 |
| AlmaLinux:10 | nodejs24-npm | 1:11.11.0-1.24.14.1.2.el10_1 | ALSA-2026:7675 |
| AlmaLinux:8 | npm | 1:10.9.7-1.22.22.2.1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | npm | 1:11.11.0-1.24.14.1.2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| AlmaLinux:8 | v8-12.4-devel | 3:12.4.254.21-1.22.22.2.1.module_el8.10.0+4158+e796f37f | ALSA-2026:7123 |
| AlmaLinux:9 | v8-13.6-devel | 3:13.6.233.17-1.24.14.1.2.module_el9.7.0+222+ef1c61e1 | ALSA-2026:7350 |
| Debian:12 | node-brace-expansion | no fix listed | DEBIAN-CVE-2026-25547 |
| Debian:13 | node-brace-expansion | no fix listed | DEBIAN-CVE-2026-25547 |
| Debian:14 | node-brace-expansion | 2.0.3+~1.1.2-2 | DEBIAN-CVE-2026-25547 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1935+d3cbe60f | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1666+930e28e8 | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.9.0+1760+903d54b9 | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1667+4a788d89 | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1823+b5789597 | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1924+614dc87f | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1988+437f3d23 | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1824+532140ee | RLSA-2026:7123 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.0.1-1.module+el8.10.0+1989+e60144d9 | RLSA-2026:7123 |
| Rocky Linux:9 | nodejs-nodemon | 0:3.0.1-1.module+el9.7.0+40018+a011993d | RLSA-2026:7302 |
| Rocky Linux:9 | nodejs-nodemon | 0:3.0.1-1.module+el9.7.0+40022+9ecc286c | RLSA-2026:7302 |
| Rocky Linux:9 | nodejs-nodemon | 0:3.0.3-3.module+el9.7.0+40025+0e0cf6b2 | RLSA-2026:7350 |
| Rocky Linux:9 | nodejs-nodemon | 0:3.0.1-1.module+el9.7.0+40017+f0db1785 | RLSA-2026:7302 |
| Rocky Linux:8 | nodejs-packaging | 0:2021.06-6.module+el8.10.0+40048+6d99f608 | RLSA-2026:7123 |
| Rocky Linux:9 | nodejs-packaging | 0:2021.06-6.module+el9.7.0+40052+e32ea525 | RLSA-2026:7302 |
| Rocky Linux:9 | nodejs-packaging | 0:2021.06-6.module+el9.7.0+40052+e32ea525 | RLSA-2026:7350 |
| Rocky Linux:10 | nodejs22 | 1:22.22.2-1.el10_1 | RLSA-2026:7080 |
| Rocky Linux:10 | nodejs24 | 1:24.14.1-2.el10_1 | RLSA-2026:7675 |
| Ubuntu:22.04:LTS | node-brace-expansion | no fix listed | UBUNTU-CVE-2026-25547 |
| Ubuntu:24.04:LTS | node-brace-expansion | no fix listed | UBUNTU-CVE-2026-25547 |
| Ubuntu:25.10 | node-brace-expansion | no fix listed | UBUNTU-CVE-2026-25547 |
| Ubuntu:26.04:LTS | node-brace-expansion | no fix listed | UBUNTU-CVE-2026-25547 |
| Ubuntu:26.10 | node-brace-expansion | no fix listed | UBUNTU-CVE-2026-25547 |
| npm | @isaacs/brace-expansion | 5.0.1 | GHSA-7h2j-956f-4vf2 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| isaacs | brace-expansion | < 5.0.1 |
Weakness: CWE-1333 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H