{"id":"CVE-2024-26146","summary":"Possible Denial of Service Vulnerability in Rack Header Parsing","details":"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.","aliases":["GHSA-54rr-7fvw-6x8f"],"modified":"2026-10-22T10:35:09.566095123Z","published":"2024-02-28T23:28:01.158Z","related":["ALSA-2024:2113","ALSA-2024:2953","SUSE-SU-2024:0765-1","SUSE-SU-2024:0946-1","SUSE-SU-2024:1131-1","USN-6689-1","openSUSE-SU-2024:13726-1","openSUSE-SU-2024:13727-1","openSUSE-SU-2025:14811-1","openSUSE-SU-2025:14875-1","openSUSE-SU-2026:10286-1","openSUSE-SU-2026:10358-1"],"database_specific":{"cwe_ids":["CWE-1333"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26146.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://discuss.rubyonrails.org/t/possible-denial-of-service-vulnerability-in-rack-header-parsing/84942"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26146.json"},{"type":"ADVISORY","url":"https://github.com/rack/rack/security/advisories/GHSA-54rr-7fvw-6x8f"},{"type":"ADVISORY","url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26146.yml"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26146"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20240510-0006/"},{"type":"FIX","url":"https://github.com/rack/rack/commit/30b8e39a578b25d4bdcc082c1c52c6f164b59716"},{"type":"FIX","url":"https://github.com/rack/rack/commit/6c5d90bdcec0949f7ba06db62fb740dab394b582"},{"type":"FIX","url":"https://github.com/rack/rack/commit/a227cd793778c7c3a827d32808058571569cda6f"},{"type":"FIX","url":"https://github.com/rack/rack/commit/e4c117749ba24a66f8ec5a08eddf68deeb425ccd"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rack/rack","events":[{"introduced":"e33cc65a013952935c6bb70e24f359023c075e84"},{"fixed":"8eb8bc6c7c4d3dd912d169c850fe2695d1728555"},{"introduced":"879ae7163a399a9ed36d876668f4ecae4ae8b9e4"},{"fixed":"c465c6389cc56ffdfa30718e490f31bcc2efbfc9"},{"introduced":"39d501a28c1fe51284addfe6dacffafb69d49849"},{"fixed":"e83001100ad9dd24e1744b13669dcb2736a13ebd"},{"fixed":"30b8e39a578b25d4bdcc082c1c52c6f164b59716"},{"fixed":"6c5d90bdcec0949f7ba06db62fb740dab394b582"},{"fixed":"a227cd793778c7c3a827d32808058571569cda6f"},{"fixed":"e4c117749ba24a66f8ec5a08eddf68deeb425ccd"}],"database_specific":{"extracted_events":[{"source":"CPE_RANGE","cpe":"cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*","range":[{"introduced":"0.4"},{"fixed":"2.0.9.4"}]},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*","range":[{"introduced":"2.1.0"},{"fixed":"2.1.4.4"}]},{"cpe":"cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*","range":[{"introduced":"2.2.0"},{"fixed":"2.2.8.1"}],"source":"CPE_RANGE"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"30b8e39a578b25d4bdcc082c1c52c6f164b59716"}]},{"source":"REFERENCES_COMMIT","range":[{"fixed":"6c5d90bdcec0949f7ba06db62fb740dab394b582"}]},{"range":[{"fixed":"a227cd793778c7c3a827d32808058571569cda6f"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"e4c117749ba24a66f8ec5a08eddf68deeb425ccd"}]}]}}],"versions":["v2.1.4.3","v2.2.8","v3.0.9","v3.0.8","v3.0.7","v2.2.7","v3.0.6","v3.0.5","v2.1.4.2","v2.2.6.2","v3.0.4.1","v2.2.6.1","v2.2.6","v3.0.4","v3.0.3","v2.2.5","2.2.4","v3.0.2","v3.0.1","3.0.0","3.0.0.rc1","3.0.0.beta1","2.1.4","2.2.3","v2.2.2","2.1.3","2.1.2","v2.2.1","2.2.0","2.1.1","2.1.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26146.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}