{"id":"CVE-2026-4893","summary":"CVE-2026-4893","details":"An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.","modified":"2026-05-26T16:59:15.329956291Z","published":"2026-05-11T16:48:15.106Z","related":["ALSA-2026:19158","ALSA-2026:19373","ALSA-2026:20589","SUSE-SU-2026:1934-1","SUSE-SU-2026:21640-1","SUSE-SU-2026:21677-1","SUSE-SU-2026:21733-1","openSUSE-SU-2026:10821-1","openSUSE-SU-2026:20748-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4893.json","unresolved_ranges":[{"extracted_events":[{"fixed":"2.92rel2"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"certcc"},"references":[{"type":"WEB","url":"https://github.com/pi-hole/FTL/releases/tag/v6.6.2"},{"type":"WEB","url":"https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"},{"type":"WEB","url":"https://thekelleys.org.uk/dnsmasq/CVE/"},{"type":"WEB","url":"https://www.kb.cert.org/vuls/id/471747"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4893.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4893"},{"type":"FIX","url":"https://github.com/NixOS/nixpkgs/pull/519082"},{"type":"FIX","url":"https://github.com/NixOS/nixpkgs/pull/519093"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pi-hole/ftl","events":[{"introduced":"0"},{"fixed":"82c58cc45435ddd77875daf368cf64398bc15966"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v6.6.1","v6.6","v6.5","v6.4.1","v6.3.3","v6.3.2","v6.3.1","v6.3","v6.2.3","v6.2.2","v6.2.1","v6.2","v6.1","v6.0.4","v6.0.3","v6.0.2","v6.0.1","v6.0","v5.25.2","v5.25.1","v5.25","v5.24","v5.23","v5.22","v5.21","v5.20.1","v5.20","v5.19.2","v5.19.1","v5.19","v5.18.2","v5.18.1","v5.18","v5.17","v5.16.3","v5.16.2","v5.16.1","v5.16","v5.15","v5.14","v5.13","v5.12.1","v5.12","v5.11","v5.10.2","v5.10.1","v5.10","v5.9","v5.8.1","v5.8","v5.7","v5.6","v5.5.1","v5.5","v5.4","v5.3.4","v5.3.3","v5.3.2","v5.3.1","v5.3","v5.2","v5.1","v5.0","v4.3.1","v4.3","v4.2.3","v4.2.2","v4.2.1","v4.2","v4.1.2","v4.1.1","v4.1","v4.0","v3.0","v2.13.2","v2.13.1","v2.13","v2.12","v2.11.1","v2.11","v2.10","v2.9.4","v2.9.3","v2.9.2","v2.9.1","v2.9","v2.8","v2.7.4","v2.7.3","v2.7.2","v2.7.1","v2.7","v2.6.2","v2.6.1","v2.6","v2.5","v2.4.1","v2.4","v2.3.1","v2.3","v2.2","v2.1","v2.0","v1.11.1","v1.11","v1.10.3","v1.10.2","v1.10.1","v1.10","v1.9","v1.8","v1.7","v1.6","v1.5.1","v1.5","v1.4","v1.3.1","v1.3","v1.2.1","v1.2","v1.1","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-4893.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"}]}