rails-html-sanitizer has XSS vulnerability with certain configurations

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0047, the 41st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 2 Dec 2024. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-638j-pmjw-jq48
• OSV: GHSA-638j-pmjw-jq48
• github.com/rails/rails-html-sanitizer/security/advisories/GHSA-638j-pmjw-jq48
• nvd.nist.gov/vuln/detail/CVE-2024-53986
• github.com/rails/rails-html-sanitizer/commit/f02ffbb8465e73920b6de0da940f5530f855965e
• github.com/rails/rails-html-sanitizer
• github.com/rubysec/ruby-advisory-db/blob/master/gems/rails-html-sanitizer/CVE-2024-53986.yml

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.