Rack vulnerable to ReDoS in content type parsing (2nd degree polynomial)

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 0.35, the 98th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:16 UTC First seen by agentprime
2. 31 Oct 2026, 15:16 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-22f2-v57c-j9cx
• OSV: GHSA-22f2-v57c-j9cx
• github.com/rack/rack/security/advisories/GHSA-22f2-v57c-j9cx
• nvd.nist.gov/vuln/detail/CVE-2024-25126
• github.com/rack/rack/commit/6efb2ceea003c4b195815a614e00438cbd543462
• github.com/rack/rack/commit/d9c163a443b8cadf4711d84bd2c58cb9ef89cf49
• discuss.rubyonrails.org/t/denial-of-service-vulnerability-in-rack-content-type-parsing/84941
• github.com/rack/rack
• github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-25126.yml
• lists.debian.org/debian-lts-announce/2024/04/msg00022.html
• security.netapp.com/advisory/ntap-20240510-0005

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.