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Vulnerability record · CVE-2022-21680 · published 14 January 2022

CVE-2022-21680: Marked project marked uncontrolled resource consumption vulnerability

MMarked Project · Marked

Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

7.5 CVSS 3.1 High EPSS 2.9% · top 13.8% CWE-400 · Uncontrolled resource consumptionCWE-1333 · Inefficient regular expression (ReDoS)
7.5CVSS 3.1 base score, v2 5.0
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0 PatchThird Party Advisory
https://github.com/markedjs/marked/releases/tag/v4.0.10 Release NotesThird Party Advisory
https://github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hf ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWL
https://github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0 PatchThird Party Advisory
https://github.com/markedjs/marked/releases/tag/v4.0.10 Release NotesThird Party Advisory
https://github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hf ExploitThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWL

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Source: NIST National Vulnerability Database (record CVE-2022-21680), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.