CVE-2023-31606

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-06-06 · updated 2026-06-17
Weakness: CWE-1333

Description

A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

Affected products

Promptworks Redcloth: from 4.0.0 through 4.3.2

References

https://github.com/e23e/CVE-2023-31606#readme
https://github.com/jgarber/redcloth
https://github.com/jgarber/redcloth/issues/73
https://lists.debian.org/debian-lts-announce/2023/07/msg00002.html
https://security.gentoo.org/glsa/202401-14
https://github.com/e23e/CVE-2023-31606#readme
https://github.com/jgarber/redcloth
https://github.com/jgarber/redcloth/issues/73
https://lists.debian.org/debian-lts-announce/2023/07/msg00002.html
https://security.gentoo.org/glsa/202401-14

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