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CVE-2022-21680 (GCVE-0-2022-21680)

Vulnerability from cvelistv5 – Published: 2022-01-14 00:00 – Updated: 2025-04-22 18:33
VLAI
Title
Cubic catastrophic backtracking (ReDoS) in marked
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-22 15:42 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
Impacted products
Vendor Product Version CPE status
markedjs marked Affected: < 4.0.10
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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    "redhat_vex": {
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      "current_release_date": "2026-08-04T21:36:21+00:00",
      "cve": "CVE-2022-21680",
      "id": "CVE-2022-21680",
      "initial_release_date": "2022-01-14T00:00:00+00:00",
      "product_status:fixed": "3",
      "product_status:known_affected": "24",
      "product_status:known_not_affected": "99",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "marked: regular expression block.def may lead Denial of Service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-21680.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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