CVE-2026-2327
Publication date 13 February 2026
Last updated 13 February 2026
Ubuntu priority
Description
Versions of the package markdown-it from 13.0.0 and before 14.1.1 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of the regex /\*+$/ in the linkify function. An attacker can supply a long sequence of * characters followed by a non-matching character, which triggers excessive backtracking and may lead to a denial-of-service condition.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| node-markdown-it | 25.10 questing |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.3 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-2327
- https://gist.github.com/ltduc147/c9abecae1b291ede4f692f2ab988c917
- https://github.com/markdown-it/markdown-it/blob/14.1.0/lib/rules_inline/linkify.mjs%23L33
- https://github.com/markdown-it/markdown-it/commit/4b4bbcae5e0990a5b172378e507b33a59012ed26
- https://security.snyk.io/vuln/SNYK-JS-MARKDOWNIT-10666750