Rack ReDoS Vulnerability in HTTP Accept Headers Parsing

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 0.0086, the 58th 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 3 Jul 2024. New records show when each source confirmed them.

Sources

• GitHub Advisory Database: GHSA-cj83-2ww7-mvq7
• OSV: GHSA-cj83-2ww7-mvq7
• github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f
• github.com/rack/rack/security/advisories/GHSA-cj83-2ww7-mvq7
• nvd.nist.gov/vuln/detail/CVE-2024-39316
• github.com/rack/rack/commit/412c980450ca729ee37f90a2661f166a9665e058
• advisory.dw1.io/61
• github.com/rack/rack
• github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-39316.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.