CVE-2024-1899

MEDIUMNVD 5.35.3—

5.3

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

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 50.2%
KEV: Not listed

Published

February 26, 2024

Last Modified

September 18, 2025

References (2)

vulnreport@tenablehttps://www.tenable.com/security/research/tra-2024-05
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/security/research/tra-2024-05

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
npm	showdown	—	ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
showdown	—	—	—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 07:52 UTCEG score recompute
2026-05-24 07:52 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2024-1899?

CVE-2024-1899 is a medium vulnerability published on February 26, 2024. An issue in the anchors subparser of Showdownjs versions <= 2.1.0 could allow a remote attacker to cause denial of service conditions.

When was CVE-2024-1899 disclosed?

CVE-2024-1899 was first published in the National Vulnerability Database on February 26, 2024, with the most recent update on September 18, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-1899 actively exploited?

CVE-2024-1899 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-1899?

CVE-2024-1899 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2024-1899?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-1899, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-1899

Explore →

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