What is CVE-2018-1109?

CVE-2018-1109 is a medium-severity vulnerability in Braces Project, classified under Incorrect Regular Expression. CVSS score: 5.3/10. Published 2021-03-30.

How severe is CVE-2018-1109?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Braces Project

CVE-2018-1109

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.

Published 2021-03-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.014 (71.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000

Affected products

Braces Project
Nodejs-Braces — versions 2.2.0

Weakness classification (CWE)

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
snyk.io/vuln/npm:braces:20180219 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-1109?: CVE-2018-1109 is a medium-severity vulnerability in Braces Project, classified under Incorrect Regular Expression. CVSS score: 5.3/10. Published 2021-03-30.
How severe is CVE-2018-1109?: Medium severity. CVSS v3 base score is 5.3 out of 10.