CVE-2026-2327 describes a Regular Expression Denial of Service (ReDoS) vulnerability in markdown-it versions 13.0.0 through 14.1.1. An attacker can exploit this by providing a specially crafted input containing a long sequence of asterisk characters, causing excessive backtracking in the linkify function and leading to a denial-of-service condition. This vulnerability carries a CVSS score of 7.5 (High), indicating a significant impact on availability with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 13.0.0, < 14.1.1CPE matchmatch criteria | cpe:2.3:a:markdown-it_project:markdown-it:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.