SB20260917235 - Inefficient Algorithmic Complexity in markdown-it

Description

This security bulletin contains information about 1 vulnerability.

1) Inefficient Algorithmic Complexity (CVE-ID: N/A)

CWE-ID: CWE-407 - Inefficient Algorithmic Complexity

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to inefficient algorithmic complexity in the smartquotes rule when processing specially crafted Markdown with unmatched closing quotes. A remote attacker can submit crafted Markdown containing many opening quotes followed by unmatched closing quotes to cause a denial of service.

Only instances with the typographer option enabled are vulnerable.

Remediation

Install update from vendor's website.

References

• https://github.com/markdown-it/markdown-it/security/advisories/GHSA-r7fv-28h4-cvq7
• https://github.com/markdown-it/markdown-it/pull/1209