CVE-2018-1109 — nodejs-braces: Regular Expression Denial of Service (ReDoS) in lib/parsers.js

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MEDIUM

nodejs-braces: Regular Expression Denial of Service (ReDoS) in lib/parsers.js

Published Mar 30, 2021

5.3

MEDIUM

CVSS 3.1

EPSS 1.39%

Description

A vulnerability was found in Braces versions 2.2.0 and above, prior to 2.3.1. Affected versions of this package are vulnerable to Regular Expression Denial of Service (ReDoS) attacks.

Affected products

Vendor n/a Product Nodejs-Braces Default
n/a
- Version
  2.2.0
  Status
  affected
  Constraints
  <2.3.1

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

Nodejs-Braces

n/a

Version	Status	Constraints
2.2.0	affected	<2.3.1

Red Hat Quay 3

quay/quay-rhel8:v3.6.0-62

Fixed · RHSA-2021:3917
Red Hat Mobile Application Platform 4

nodejs-braces

Not affected
Red Hat OpenShift Enterprise 3

nodejs-braces

Not affected
Red Hat Software Collections

rh-nodejs4-nodejs-braces

Not affected
Red Hat Software Collections

rh-nodejs6-nodejs-braces

Not affected
Red Hat Software Collections

rh-nodejs8-nodejs-braces

Not affected

Product	Package	State	Advisory
Red Hat Quay 3	quay/quay-rhel8:v3.6.0-62	Fixed	RHSA-2021:3917
Red Hat Mobile Application Platform 4	nodejs-braces	Not affected	n/a
Red Hat OpenShift Enterprise 3	nodejs-braces	Not affected	n/a
Red Hat Software Collections	rh-nodejs4-nodejs-braces	Not affected	n/a
Red Hat Software Collections	rh-nodejs6-nodejs-braces	Not affected	n/a
Red Hat Software Collections	rh-nodejs8-nodejs-braces	Not affected	n/a

Ecosystem	Package	Introduced	Fixed
npm	braces	2.2.0	2.3.1

Remediation

Red Hat statement

Red Hat Quay includes braces as a dependency of webpack. Braces is only used at build time, not at runtime, reducing the impact of this vulnerability to low.

Metrics

1.39% 0.01389

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01389

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.39% (0.01389)	71.30th	v5 (v2026.06.15)
Sep 20, 2026	1.39% (0.01389)	71.08th	v5 (v2026.06.15)
Jul 20, 2024	0.12% (0.00117)	46.01th	v3 (v2023.03.01)
Dec 13, 2023	0.12% (0.00117)	45.31th	v3 (v2023.03.01)
Nov 3, 2023	0.10% (0.00102)	41.65th	v3 (v2023.03.01)
Mar 7, 2023	0.09% (0.00088)	36.05th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)
Feb 3, 2022	0.78% (0.00777)	21.50th	v5 (v2026.06.15)
Apr 14, 2021	0.78% (0.00777)	0.00th	v1

Weaknesses (3)

CWE-1333

CWE-185

CWE-400

Uncontrolled Resource Consumption

References (7)

https://access.redhat.com/security/cve/CVE-2018-1109
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1547272
x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/advisories/GHSA-cwfw-4gq5-mrqx
Advisory
https://github.com/micromatch/braces/commit/abdafb0cae1e0c00f184abbadc692f4eaa98f451
https://nvd.nist.gov/vuln/detail/CVE-2018-1109
https://snyk.io/vuln/npm:braces:20180219
x_refsource_MISCExploitThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2018-1109

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2018-1109		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1547272		x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/advisories/GHSA-cwfw-4gq5-mrqx		Advisory
https://github.com/micromatch/braces/commit/abdafb0cae1e0c00f184abbadc692f4eaa98f451
https://nvd.nist.gov/vuln/detail/CVE-2018-1109
https://snyk.io/vuln/npm:braces:20180219		x_refsource_MISCExploitThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2018-1109