CVE-2026-33750: fallo de gravedad media en juliangruber brace-expansion
brace-expansion: Zero-step sequence causes process hang and memory exhaustion
Publicada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 6.5epss 0.4%
The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13, a brace pattern with a zero step value (e.g., `{1..2..0}`) causes the sequence generation loop to run indefinitely, making the process hang for seconds and allocate heaps of memory. Versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13 fix the issue. As a workaround, sanitize strings passed to `expand()` to ensure a step value of `0` is not used.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Productos afectados
juliangruber · brace-expansionCVEs relacionadas — juliangruber brace-expansion
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-69152HIGHbrace-expansion: DoS via unbounded intermediate arrays, bypassing the CVE-2026-14257 mitigationEPSS 0.6%CVE-2026-14257HIGHbrace-expansion DoS via unbounded expansion length causing an out-of-memory process crashEPSS 0.6%CVE-2025-5889LOWjuliangruber brace-expansion index.js expand redosEPSS 0.6%CVE-2026-102278HIGHbrace-expansion: DoS via uncontrolled recursion on nested brace groups causing stack exhaustionEPSS 0.5%CVE-2026-102276HIGHbrace-expansion: DoS via uncontrolled recursion in parseCommaParts causing stack exhaustionEPSS 0.5%CVE-2026-102277MEDIUMbrace-expansion: Quadratic-time expansion of the `{a},b}` rewrite causes CPU denial of serviceEPSS 0.4%
Referencias
https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184https://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5https://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2https://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902ahttps://github.com/juliangruber/brace-expansion/issues/98https://github.com/juliangruber/brace-expansion/pull/95https://github.com/juliangruber/brace-expansion/pull/96https://github.com/juliangruber/brace-expansion/pull/97https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-f886-m6hf-6m8v