CVE-2015-10005 markdown-it html_re.js redos
An attacker can cause a denial of service in markdown-it by exploiting inefficient regular expression complexity in the HTML parsing logic.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2015-10005?
CVE-2015-10005 is a low-severity denial of service vulnerability in markdown-it, published on 27 Dec 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in markdown-it up to 2.x. It has been classified as problematic. Affected is an unknown function of the file lib/common/html_re.js. The manipulation leads to inefficient regular expression complexity. Upgrading to version 3.0.0 is able to address this issue. The name of the patch is 89c8620157d6e38f9872811620d25138fc9d1b0d. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216852.
Weakness: CWE-1333
Which versions are affected by CVE-2015-10005?
2 open source packages ship an affected version, including markdown-it. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
markdown-it npm | All versions | 3.0.0 |
markdown-it npm | All versions | 3.0.0 |
Products include Markdown-It Project Markdown-It.
How do I fix CVE-2015-10005?
Upgrade markdown-it to 3.0.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2015-10005 being exploited?
There is no known exploitation of CVE-2015-10005 in the wild and no public exploit code.
Other vulnerabilities in markdown-it
- CVE-2026-2327 markdown-it is has a Regular Expression Denial of Service (ReDoS)
- CVE-2025-7969 Markdown-it 14.1.0 - Cross-site scripting (XSS)
- CVE-2026-48988 markdown-it: Quadratic complexity DoS in smartquotes rule via replaceAt string operations
- CVE-2022-21670 Uncontrolled Resource Consumption in markdown-it
- CVE-2015-3295 Cross-site scripting in n/a
Sources
Also known as GHSA-j5p7-jf4q-742q, UBUNTU-CVE-2015-10005.