RedCloth Regular Expression Denial of Service issue

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 0.015, the 74th 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 6 Jun 2023. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-qcm3-vfq5-wfr2
• OSV: GHSA-qcm3-vfq5-wfr2
• nvd.nist.gov/vuln/detail/CVE-2023-31606
• github.com/jgarber/redcloth/issues/73
• github.com/jgarber/redcloth/commit/8b1327688fef8e6617792054ef299d7bc74c0a1e
• github.com/e23e/CVE-2023-31606#readme
• github.com/jgarber/redcloth
• github.com/jgarber/redcloth/blob/v4.3.2/lib/redcloth/formatters/html.rb#L327
• github.com/rubysec/ruby-advisory-db/blob/master/gems/RedCloth/CVE-2023-31606.yml
• lists.debian.org/debian-lts-announce/2023/07/msg00002.html
• security.gentoo.org/glsa/202401-14

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.