How severe is CVE-2024-1899?

CVE-2024-1899 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2024-1899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-1899?

CVE-2024-1899 affects Showdownjs Showdown. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-1899?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-1899 have an EU (EUVD) identifier?

Yes. CVE-2024-1899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-17621.

When was CVE-2024-1899 published?

CVE-2024-1899 was published on 2024-02-26 and last updated on 2026-06-17.

CVE-2024-1899

CVE-2024-1899 is a medium-severity vulnerability in Showdownjs Showdown with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-17621
Weakness: CWE-674
Affected product: Showdownjs Showdown
Published: 2024-02-26
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2024-1899?: An issue in the anchors subparser of Showdownjs versions <= 2.1.0 could allow a remote attacker to cause denial of service conditions.
How severe is CVE-2024-1899?: CVE-2024-1899 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2024-1899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-1899?: CVE-2024-1899 affects Showdownjs Showdown. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-1899?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-1899 have an EU (EUVD) identifier?: Yes. CVE-2024-1899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-17621.
When was CVE-2024-1899 published?: CVE-2024-1899 was published on 2024-02-26 and last updated on 2026-06-17.

References

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

Affected products (1)

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

Other CWE-674 (Uncontrolled Recursion) vulnerabilities

CVE-2026-43185 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix signededness bug in…
CVE-2023-51803 — Critical (CVSS 9.8): LinuxServer.io Heimdall before 2.5.7 does not prevent use of icons that have non-image data such as the "<?php ?>"…
CVE-2021-41752 — Critical (CVSS 9.8): Stack overflow vulnerability in Jerryscript before commit e1ce7dd7271288be8c0c8136eea9107df73a8ce2 on Oct 20, 2021 due…
CVE-2018-1000618 — Critical (CVSS 9.8): EOSIO/eos eos version after commit f1545dd0ae2b77580c2236fdb70ae7138d2c7168 contains a stack overflow vulnerability in…
CVE-2025-10728 — Critical (CVSS 9.4): When the module renders a Svg file that contains a <pattern> element, it might end up rendering it recursively leading…
CVE-2026-40324 — Critical (CVSS 9.1): Hot Chocolate is an open-source GraphQL server. Prior to versions 12.22.7, 13.9.16, 14.3.1, and 15.1.14, Hot…

Browse all CWE-674 (Uncontrolled Recursion) vulnerabilities →