High severity7.5NVD Advisory· Published Oct 26, 2024· Updated Jun 17, 2026
CVE-2020-26311
CVE-2020-26311
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
useragentnpm | <= 2.3.0 | — |
Affected products
3- cpe:2.3:a:useragent_project:useragent:*:*:*:*:*:node.js:*:*
- 3rd-Eden/useragentv5Range: 0
Patches
Vulnerability mechanics
References
7- securitylab.github.com/advisories/GHSL-2020-312-redos-useragent/nvdExploitThird Party Advisory
- github.com/advisories/GHSA-mgfv-m47x-4wqpghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2020-26311ghsaADVISORY
- securitylab.github.com/advisories/GHSL-2020-312-redos-useragentghsaADVISORY
- github.com/3rd-Eden/useragent/blob/ffa906f923183c85fbb9e6c90f19345e2bd3c52a/lib/regexps.jsghsaWEB
- github.com/3rd-Eden/useragent/commit/4c3ee79358bea72d88fe78ac98f4f861db40b89bghsaWEB
- github.com/3rd-Eden/useragent/issues/167nvdIssue TrackingWEB
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