{"id":"CVE-2023-27539","details":"There is a denial of service vulnerability in the header parsing component of Rack.","aliases":["GHSA-c6qg-cjj8-47qp"],"modified":"2026-05-18T12:02:50.703446020Z","published":"2025-01-09T00:33:47.737Z","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"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27539.json","cna_assigner":"hackerone"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rack/rack","events":[{"introduced":"52901caf09ebcda879512a8605059963a49df55d"},{"fixed":"ee7919ea04303717858be1c3f16b406adc6d8cff"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-27539.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}