{"id":"CVE-2026-52688","aliases":["ALPINE-CVE-2026-52688","DEBIAN-CVE-2026-52688","EUVD-2026-47930","GHSA-q3h2-8p56-9cg6","UBUNTU-CVE-2026-52688"],"status":"published","title":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00176,"percentile":0.07181,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-295","CWE-345"],"published":"2026-07-23T08:03:58Z","modified":"2026-11-03T06:32:56Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"pdns-recursor","fixed_in":["5.4.4-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns-recursor","fixed_in":["5.2.12-0+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns-recursor","fixed_in":["5.4.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.24","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.4-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.4-1","4.8.6-1","4.8.7-1","4.8.8-1","4.8.8-1+deb12u1","4.9.0-1","4.9.0-2","4.9.1-1","4.9.1-2","4.9.1-3","4.9.1-4","4.9.2-1","4.9.2-2","4.9.3-1","4.9.4-1","4.9.5-1","5.0.5-1","5.0.7-1","5.0.7-2","5.0.9-1","5.1.3-1","5.1.3-2","5.2.0-1","5.2.0-2","5.2.0-3","5.2.0-4","5.2.0-5","5.2.1-1","5.2.2-1","5.2.2-2","5.2.4-1","5.2.4-2","5.2.5-1","5.3.0-1","5.3.0-2","5.3.0-3","5.3.0-4","5.3.0-5","5.3.1-1","5.3.3-1","5.3.4-1","5.3.4-2","5.3.5-1","5.4.0-1","5.4.1-1","5.4.1-2","5.4.2-1","5.4.2-2","5.4.3-1","5.4.4-1","5.4.5-1","5.4.6-1","5.4.6-2","5.4.8-1"]},{"source":"osv","ecosystem":"Debian:13","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.12-0+deb13u1"}]}],"versions":["5.2.11-0+deb13u1","5.2.4-2","5.2.4-2+deb13u1","5.2.5-1","5.2.6-0+deb13u1","5.2.7-0+deb13u1","5.2.8-0+deb13u1","5.2.9-0+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.4-1"}]}],"versions":["5.2.4-2","5.2.5-1","5.3.0-1","5.3.0-2","5.3.0-3","5.3.0-4","5.3.0-5","5.3.1-1","5.3.3-1","5.3.4-1","5.3.4-2","5.3.5-1","5.4.0-1","5.4.1-1","5.4.1-2","5.4.2-1","5.4.2-2","5.4.3-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.3-1","4.0.0~alpha1-1","4.0.0~alpha1-2","4.0.0~alpha2-2","4.0.0~alpha2-2ubuntu0.1","4.0.0~alpha2-2ubuntu0.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.0.6-1","4.0.6-1build1","4.0.7-1","4.1.1-1","4.1.1-1build1","4.1.1-2","4.1.1-2ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.0-6","4.2.1-1","4.2.1-1build1","4.2.1-1build2","4.2.1-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.2-3","4.6.0-1ubuntu1","4.6.0-1ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.9.0-2","4.9.1-4","4.9.2-1","4.9.2-1build1","4.9.2-2","4.9.3-1","4.9.3-1build2","4.9.3-1build3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.5-1","5.4.3-1","5.4.5-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.4-2build2","5.3.1-1","5.3.3-1","5.3.4-1","5.3.4-1build1","5.3.4-2","5.3.5-1"]}],"products":[{"vendor":"powerdns","product":"recursor"}],"references":[{"url":"https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52688","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-q3h2-8p56-9cg6"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-52688","tags":["advisory"]},{"url":"https://repo.powerdns.com/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52688.json","tags":["advisory"]},{"url":"https://github.com/PowerDNS/pdns","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-52688","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-52688","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52688","tags":["report"]},{"url":"https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-10.html","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-52688","title":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T08:03:58.542Z","modified":"2026-07-23T13:56:15.511Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-345","CWE-295"],"updated_at":"2026-11-02T13:40:57.334596Z"}],"euvd":[{"id":"EUVD-2026-47930","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T08:03:58Z","modified":"2026-07-23T13:56:15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:19:44.021778Z"}],"ghsa":[{"id":"GHSA-q3h2-8p56-9cg6","title":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T09:32:01Z","modified":"2026-07-23T15:31:47Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:09:43.143268Z"}],"nvd":[{"id":"CVE-2026-52688","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T09:16:27.08Z","modified":"2026-10-24T13:10:00.147Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-295","CWE-345"],"updated_at":"2026-11-02T14:12:32.473901Z"}],"osv":[{"id":"ALPINE-CVE-2026-52688","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T09:16:27.08Z","modified":"2026-11-03T06:32:56.398840651Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T07:16:26.770911Z"},{"id":"CVE-2026-52688","title":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T08:03:58.542Z","modified":"2026-10-28T11:16:52.909870153Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:07.431113Z"},{"id":"DEBIAN-CVE-2026-52688","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T09:16:27.08Z","modified":"2026-10-25T10:00:36.951422448Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:56.877408Z"},{"id":"UBUNTU-CVE-2026-52688","description":"RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation","status":"published","published":"2026-07-23T09:16:00Z","modified":"2026-10-17T12:58:34.581567438Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:56:33.391918Z"}]}}