CVE-2024-1899

Showdownjs Denial of Service

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Published Feb 26, 2024 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

An issue in the anchors subparser of Showdownjs versions <= 2.1.0 could allow a remote attacker to cause denial of service conditions.

Affected Products

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

Vendor Product Default status Versions

Showdownjs

Showdown

unaffected

Version	Status	Constraints
`0`	affected	≤ 2.1.0

Configuration 1 [-]

cpe:2.3:a:showdownjs:showdown:*:*:*:*:*:node.js:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2024-17621	An issue in the anchors subparser of Showdownjs versions <= 2.1.0 could allow a remote attacker to cause denial of service conditions.
Github GHSA	GHSA-rmmh-p597-ppvv	Showdown vulnerable to Regular Expression Denial of Service (ReDoS) in link/anchor parsing

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.806% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.tenable.com/security/research/tra-2024-05

History

Sep 18, 2025 4:30 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Showdownjs Showdownjs showdown
CPEs		cpe:2.3:a:showdownjs:showdown::::::node.js::*
Vendors & Products		Showdownjs Showdownjs showdown

Subscriptions

Showdownjs Showdown

Weaknesses

CWE-674

Sources

CVE record Updated: Aug 1, 2024, 6:56 PM

Status: PUBLISHED
Assigner: tenable
Published: Feb 26, 2024, 6:45 PM
Updated: Aug 1, 2024, 6:56 PM
Reserved: Feb 26, 2024, 6:20 PM

View source JSON

Vulnrichment Updated: Aug 1, 2024, 6:56 PM

Updated: Aug 1, 2024, 6:56 PM

NVD Updated: Jun 17, 2026, 7:05 AM

Status: Analyzed
Published: Feb 26, 2024, 7:15 PM
Modified: Jun 17, 2026, 7:05 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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