What’s Vulnerable › Vulnerabilities

CVE-2021-43308: Exponential ReDoS in markdown-link-extractor

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-06-02 · updated 2026-06-17
• Weakness: CWE-1333

Description

An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the markdown-link-extractor npm package, when an attacker is able to supply arbitrary input to the module's exported function

Affected products

• markdown-link-extractor: before 3.0.2; 4.0.0 — fixed in 3.0.2

How to fix

Upgrade to a fixed version: markdown-link-extractor 3.0.2. Check the vendor advisory for mitigations.

References

• https://research.jfrog.com/vulnerabilities/markdown-link-extractor-redos-xray-211350/
• https://research.jfrog.com/vulnerabilities/markdown-link-extractor-redos-xray-211350/

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