{"schema_version":"1.9.0","id":"CVE-2023-27539","published":"2025-01-09T00:33:47.737Z","modified":"2026-08-12T03:51:32.524659328Z","aliases":["GHSA-c6qg-cjj8-47qp"],"related":["ALSA-2023:2652","ALSA-2023:3082","SUSE-SU-2023:1685-1","SUSE-SU-2023:1869-1","USN-6689-1","openSUSE-SU-2024:12789-1","openSUSE-SU-2024:12805-1","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"],"details":"There is a denial of service vulnerability in the header parsing component of Rack.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rack/rack","events":[{"introduced":"1a408687493175250408fe87c5046bf1adfa6386"},{"fixed":"27addc7f1ae290b6b84c1c351e5b6d75a05bb40b"},{"introduced":"52901caf09ebcda879512a8605059963a49df55d"},{"fixed":"098d8e12c1553411ee198d7890c1fd9f1e8cf979"},{"fixed":"231ef369ad0b542575fb36c74fcfcfabcf6c530c"},{"fixed":"ee7919ea04303717858be1c3f16b406adc6d8cff"}],"database_specific":{"cpe":"cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*","extracted_events":[{"introduced":"2.0.0"},{"fixed":"2.2.6.4"},{"introduced":"3.0.0"},{"fixed":"3.0.6.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["2.2.6.4","3.0.6.1","v2.2.6.3","v3.0.6","v3.0.5","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","2.2.3","v2.2.2","v2.2.1","2.2.0","2.1.0","2.0.1","2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-27539.json"}}],"references":[{"type":"WEB","url":"https://discuss.rubyonrails.org/t/cve-2023-27539-possible-denial-of-service-vulnerability-in-racks-header-parsing/82466"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27539.json"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-c6qg-cjj8-47qp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27539"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20231208-0016/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5530"},{"type":"FIX","url":"https://github.com/rack/rack/commit/231ef369ad0b542575fb36c74fcfcfabcf6c530c"},{"type":"FIX","url":"https://github.com/rack/rack/commit/ee7919ea04303717858be1c3f16b406adc6d8cff"}],"database_specific":{"cna_assigner":"hackerone","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27539.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}