{"cve":"CVE-2024-26146","nvd":{"published":"2024-02-29T00:15:51.597","modified":"2026-06-17T07:17:11.747","status":"Analyzed","description":"Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-1333"],"references":["https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942","https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716","https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582","https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f","https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd"],"products":["debian:debian_linux","rack:rack"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2024-26146","score":0.01996,"percentile":0.80717,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-54rr-7fvw-6x8f","url":"https://osv.dev/vulnerability/GHSA-54rr-7fvw-6x8f","summary":"Rack Header Parsing leads to Possible Denial of Service Vulnerability","modified":"2026-09-10T03:50:05.329510159Z","packages":[{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":[">=3.0.0 <3.0.9.1"],"fixed":["3.0.9.1"]},{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":[">=2.2.0 <2.2.8.1"],"fixed":["2.2.8.1"]},{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":[">=2.1.0 <2.1.4.4"],"fixed":["2.1.4.4"]},{"ecosystem":"RubyGems","name":"rack","purl":"pkg:gem/rack","ranges":["<2.0.9.4"],"fixed":["2.0.9.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}