CVE-2018-1109

Exp

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: 2021-03-29 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1109 is rated High Exploit Risk (61/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.36%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-1109

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-1109

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.39% 1.36% +0.97%
2 2025-11-21 0.25% 0.39% +0.14%
3 2025-11-18 — 0.25% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1109

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-1109

GitHub Security Advisory for CVE-2018-1109

GHSA-cwfw-4gq5-mrqx · Severity: low · Ecosystem: npm — Regular Expression Denial of Service (ReDoS) in braces

OS Trackers for CVE-2018-1109

vendor priority summary link
debian unimportant CVE-2018-1109 unimportant priority: Debian including 1 source packages (node-braces), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-1109
redhat low — https://access.redhat.com/security/cve/CVE-2018-1109
ubuntu medium CVE-2018-1109 medium priority: Ubuntu including 1 source packages (node-braces), 9 status rows across 9 suites (artful, bionic, cosmic, disco, eoan, focal, trusty, upstream, xenial): ignored 3, not-affected 3, DNE 2, released 1. https://ubuntu.com/security/CVE-2018-1109

Affected software / configurations for CVE-2018-1109

Vendor Product Version Raw CPE
braces_project braces < 2.3.1 cpe:2.3:a:braces_project:braces:*:*:*:*:*:node.js:*:*

References for CVE-2018-1109

URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1547272 Issue Tracking Patch Third Party Advisory
https://snyk.io/vuln/npm:braces:20180219 Exploit Third Party Advisory
cvelogic Threat Intelligence