CVE-2026-33750

HIGH EPSS 34.5%
Published Mar 27, 20263mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 27, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
34.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 4

VendorProductVersionRange
juliangruberbrace-expansion* <1.1.13
juliangruberbrace-expansion*≥2.0.0  –  <2.0.3
juliangruberbrace-expansion*≥3.0.0  –  <3.0.2
juliangruberbrace-expansion*≥5.0.0  –  <5.0.5

References 10

  • github.com https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902a
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/issues/98
    Issue Tracking
  • github.com https://github.com/juliangruber/brace-expansion/pull/95
    Issue TrackingPatch
  • github.com https://github.com/juliangruber/brace-expansion/pull/96
    Issue TrackingPatch
  • github.com https://github.com/juliangruber/brace-expansion/pull/97
    Issue TrackingPatch
  • github.com https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-f886-m6hf-6m8v
    MitigationVendor Advisory

Remediation

  • github.com https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902a
    Patch
  • github.com https://github.com/juliangruber/brace-expansion/pull/95
    Issue TrackingPatch
  • github.com https://github.com/juliangruber/brace-expansion/pull/96
    Issue TrackingPatch
  • github.com https://github.com/juliangruber/brace-expansion/pull/97
    Issue TrackingPatch