Stack Overflow Vulnerability in Micromatch Braces Product
CVE-2026-93687

8.7HIGH

Key Information:

Vendor

Micromatch

Status
Braces
Vendor
CVE Published:
18 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-93687?

The Micromatch braces library up to version 3.0.3 is susceptible to a stack overflow due to insufficient depth guarding in its recursive Abstract Syntax Tree (AST) walkers. Attackers can exploit this vulnerability by providing deeply nested brace patterns within the character limit, which may lead to excessive call stack consumption. This, in turn, can cause the Node.js process to crash with an uncaught RangeError, potentially jeopardizing application stability and security.

Affected Version(s)

braces 0 <= 3.0.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

node-braces
Created by pillarsdotnet

References

https://github.com/micromatch/braces/issues/70
issue-tracking
https://github.com/micromatch/braces
product
https://github.com/micromatch/braces/blob/3.0.3/lib/compi...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wayde Shi (PayPal Cyber Security Team)
.