CVE-2023-28626 - CVE House

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Status published Medium CVE-2023-28626

Quadratic runtime when parsing Markdown in comrak

5.3 CVSS

Vulnerability Description

comrak is a CommonMark + GFM compatible Markdown parser and renderer written in rust. A range of quadratic parsing issues are present in Comrak. These can be used to craft denial-of-service attacks on services that use Comrak to parse Markdown. This issue has been addressed in version 0.17.0. Users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as `GHSL-2023-047`

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from kivikakk

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Attacker controlled data in AST nodes is not validated in comrak

Affected Vendor

kivikakk

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Affected Software

comrak

Vulnerable Versions:

< 0.17.0

Timeline

Official Publish: March 28th, 2023

Last Modified: February 18th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service

T1498 Network Denial of Service