Showdown vulnerable to Regular Expression Denial of Service (ReDoS) in link/anchor parsing
Showdownjs, versions <= 2.1.0, anchors subparser used to parse links has a nested regular expression which can lead to denial of service conditions given malicious input.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | showdown | <= 2.1.0 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- Weakness (CWE)
CWE-674, CWE-777- Platform
- npm
- Package
showdown- Disclosed
- 26.02.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-rmmh-p597-ppvv - CC BY 4.0
Vulnerability history: showdown
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 09.2020 07.2026
- Without a fix
- 3
- Exploited in attacks
- 0
Severity breakdown
- Medium 3
- Low 1
Disclosures per year
- 2020: 1
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 2
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Showdown vulnerable to Regular Expression Denial of Service (ReDoS) in link/anchor parsing this entry
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