CVE-2024-1899

FAUCET Score

CVE-2024-1899 is a denial-of-service vulnerability affecting Showdownjs versions 2.1.0 and earlier, specifically within its anchors subparser. This medium-severity vulnerability (CVSS 5.3) can be exploited remotely with low attack complexity, potentially leading to service disruption without requiring user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 0, <= 2.1.0CPE match	cpe:2.3:a:showdownjs:showdown::::::node.js::*
		<= 2.1.0CPE matchmatch criteria	cpe:2.3:a:showdownjs:showdown::::::node.js::*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

Exploitability Score

3.9

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.80%

Probability of exploitation in next 30 days

EPSS Percentile

52.8%

Percentile rank of EPSS score among Peer Group

As of 2026-07-26

Model: v2026.06.15

This CVE's current EPSS score of 0.0080 is in the 33rd percentile among its peer group of 23,701 CVEs.

Social Chatter

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

Media Mentions

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

Remediation

Vendor Patches (1)

ranchervendor investigatingvia llm_extracted

Vendor Advisories (2)

npmGHSA-rmmh-p597-ppvvmedium

Showdown vulnerable to Regular Expression Denial of Service (ReDoS) in link/anchor parsing

Feb 26, 2024

rancherllm-rancher-dc7152e9099c556cMEDIUM

Showdownjs Denial of Service

Feb 26, 2024

References

tenable.com / security/research/tra-2024-05

ExploitThird Party Advisory