What’s Vulnerable › Vulnerabilities

CVE-2020-26311: GHSL-2020-312: Regular Expression Denial of Service (ReDoS) in useragent

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-10-26 · updated 2026-06-17
• Weakness: CWE-1333

Description

Useragent is a user agent parser for Node.js. All versions as of time of publication contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no patches are available.

Affected products

• HackerOne useragent node module: all versions

References

• https://github.com/3rd-Eden/useragent/issues/167
• https://securitylab.github.com/advisories/GHSL-2020-312-redos-useragent/

Get alerted when CVE-2020-26311 or the next vulnerability affects your stack