# CVE-2026-102277: brace-expansion: Quadratic-time expansion of the `{a},b}` rewrite causes CPU denial of service

CVE-2026-102277 is fixed in 12 products on 1 platform, first by DEBIAN-CVE-2026-102277, released October 9, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-102277
- Priority: High
- CVSS: 8.1 (Moderate)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 28, 2026
- Weakness: Uncontrolled Resource Consumption
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102277

## Description

The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to 1.1.21, 2.1.7, 3.0.9, and 5.0.12, the expand function handles untrusted {a},b}-shaped patterns with many trailing closing braces by restarting its scan once for each trailing closing brace. The successive full-input rescans with linear working-string growth cause quadratic CPU time and memory pressure that can block the Node.js event loop. The process eventually recovers, making the impact a recoverable CPU denial of service. This issue is fixed in versions 1.1.21, 2.1.7, 3.0.9, and 5.0.12.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-brace-expansion Debian 14 | 2.1.7+~1.1.2-1 | [DEBIAN-CVE-2026-102277](https://patchblox.com/security/data/fix/linux/debian-cve-2026-102277.md) | Oct 9, 2026 |
| Linux | nodejs RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs rocky 9 | 1:24.22.1-3.module+el9.8.0+40401+e24b8c95 | [RLSA-2026:92378](https://patchblox.com/security/data/fix/linux/rlsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-devel RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-devel RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-devel almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-devel almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-devel ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-devel ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-docs RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-docs RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-docs almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-docs almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-docs ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-docs ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-full-i18n RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-full-i18n almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-libs RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-libs RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-libs almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-libs almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-libs ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-libs ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon RHEL 8 | 0:3.1.14-2.module+el8.10.0+24711+b610b202 | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-nodemon RHEL 9 | 0:3.1.14-3.module+el9.8.0+24708+e71d2e1d | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-nodemon almalinux 8 | 3.1.14-2.module_el8.10.0+4250+09238ed4 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon almalinux 9 | 3.1.14-3.module_el9.8.0+292+f4eaf8b2 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon ol 8 | 0:3.1.14-2.module+el8.10.0+91054+4b1a799c | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon ol 9 | 0:3.1.14-3.module+el9.8.0+91009+5d530ccd | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon rocky 8 | 0:3.1.14-2.module+el8.10.0+40277+b1b3f89e | [RLSA-2026:92376](https://patchblox.com/security/data/fix/linux/rlsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon rocky 9 | 0:3.1.14-3.module+el9.8.0+40281+14cc6568 | [RLSA-2026:92378](https://patchblox.com/security/data/fix/linux/rlsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging RHEL 8 | 0:2021.06-6.module+el8.10.0+24711+b610b202 | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-packaging RHEL 9 | 0:2021.06-6.module+el9.8.0+24708+e71d2e1d | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-packaging almalinux 8 | 2021.06-6.module_el8.10.0+4086+70facd4a | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging almalinux 9 | 2021.06-6.module_el9.7.0+209+ecf6523e | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging ol 8 | 0:2021.06-6.module+el8.10.0+91054+4b1a799c | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging ol 9 | 0:2021.06-6.module+el9.8.0+91009+5d530ccd | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging rocky 8 | 0:2021.06-6.module+el8.10.0+40048+6d99f608 | [RLSA-2026:92376](https://patchblox.com/security/data/fix/linux/rlsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging rocky 9 | 0:2021.06-6.module+el9.7.0+40165+d075e3f2 | [RLSA-2026:92378](https://patchblox.com/security/data/fix/linux/rlsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler RHEL 8 | 0:2021.06-6.module+el8.10.0+24711+b610b202 | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-packaging-bundler RHEL 9 | 0:2021.06-6.module+el9.8.0+24708+e71d2e1d | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-packaging-bundler almalinux 8 | 2021.06-6.module_el8.10.0+4086+70facd4a | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler almalinux 9 | 2021.06-6.module_el9.7.0+209+ecf6523e | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler ol 8 | 0:2021.06-6.module+el8.10.0+91054+4b1a799c | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler ol 9 | 0:2021.06-6.module+el9.8.0+91009+5d530ccd | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | npm RHEL 8 | 1:11.19.1-1.24.22.1.1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | npm RHEL 9 | 1:11.19.1-1.24.22.1.3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | npm almalinux 8 | 1:11.19.1-1.24.22.1.1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | npm almalinux 9 | 1:11.19.1-1.24.22.1.3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | npm ol 8 | 1:11.19.0-1.24.21.0.1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | npm ol 9 | 1:11.19.0-1.24.21.0.1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | pi-coding-agent opensuse-leap 16.0 | 1.0.4-bp160.1.1 | [OPENSUSE-SU-2026:22111-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22111-1.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel RHEL 8 | 3:13.6.233.17-1.24.22.1.1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | v8-13.6-devel RHEL 9 | 3:13.6.233.17-1.24.22.1.3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | v8-13.6-devel almalinux 8 | 3:13.6.233.17-1.24.22.1.1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel almalinux 9 | 3:13.6.233.17-1.24.22.1.3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel ol 8 | 3:13.6.233.17-1.24.21.0.1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel ol 9 | 3:13.6.233.17-1.24.21.0.1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |

---

Data as of 2026-11-09T19:38:12Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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