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CVE-2023-39619

21
FAUCET Score

CVE-2023-39619 is a Regular Expression Denial of Service (ReDoS) vulnerability affecting version 1.0.4 of the NPMJS Node Email Check library. This high-severity vulnerability (CVSS 7.5) allows an unauthenticated attacker to cause a denial of service by submitting a specially crafted string to the scpSyntax component, requiring no user interaction. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.4CPE matchmatch criteria
cpe:2.3:a:teomantuncer:node_email_check:1.0.4:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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 Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 39th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-9242-6p36-6256high

Inefficient Regular Expression Complexity in node-email-check

Oct 25, 2023

References

gist.github.com / 6en6ar/712a4c1eab0324f15e09232c77ea08f8
Exploit
github.com / teomantuncer/node-email-check/blob/main/main.js%2C
npmjs.com / package/node-email-check
Product