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CVE-2026-111759 Details

Description

markdown-it is a Markdown parser. Prior to 14.3.2 and 15.0.2, when typographer: true is enabled, specially crafted Markdown can cause quadratic processing time in the smartquotes rule, potentially leading to denial of service in applications processing untrusted input. Many opening double quotes followed by unmatched closing single quotes cause repeated scans of the entire opener stack. The same issue occurs with the quote types reversed. The default configuration (typographer: false) is not affected, but this option is enabled with high probability. This issue is fixed in versions 14.3.2 and 15.0.2.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7	CISA-ADP
https://github.com/markdown-it/markdown-it/commit/1b379c1b6d0522421bd1a51b77337c79af2c8670	[email protected]
https://github.com/markdown-it/markdown-it/commit/cf27366035edf9196667110c47d9d67b030a4152	[email protected]
https://github.com/markdown-it/markdown-it/commit/daf5a3c32303e5d9de01b12eeb725fb5990b8162	[email protected]
https://github.com/markdown-it/markdown-it/releases/tag/14.3.2	[email protected]
https://github.com/markdown-it/markdown-it/releases/tag/15.0.2	[email protected]
https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7	[email protected]

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	[email protected]
CWE-407	Inefficient Algorithmic Complexity	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 19, 2026	CVE Modified	CISA-ADP
Oct 19, 2026	New CVE Received	[email protected]