{"id":"CVE-2026-6664","aliases":["AZL-86234","BIT-pgbouncer-2026-6664","DEBIAN-CVE-2026-6664","EUVD-2026-28876","GHSA-pmgp-q838-fh9g","UBUNTU-CVE-2026-6664"],"status":"published","title":"PgBouncer integer overflow in PgBouncer network packet parsing","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00698,"percentile":0.53392,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-190"],"published":"2026-05-09T00:43:42Z","modified":"2026-10-17T13:00:35Z","exploits":[{"source":"pocgithub","id":"nicolasjulian/bouncer-overflow","title":"nicolasjulian/bouncer-overflow","date":"2026-05-12","url":"https://github.com/nicolasjulian/bouncer-overflow"}],"fixes":[{"ecosystem":"Azure Linux:3","package":"pgbouncer","fixed_in":["1.25.2-1"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"pgbouncer","fixed_in":["1.25.2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pgbouncer","fixed_in":["1.24.1-1+deb13u2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pgbouncer","fixed_in":["1.25.2-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25.2-1"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"pgbouncer","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.18.0-1","1.18.0-1+deb12u1","1.19.0-1","1.19.1-1","1.20.0-1","1.20.1-1","1.21.0-1","1.22.0-1","1.22.1-1","1.23.0-1","1.23.1-1","1.24.0-2","1.24.0-3","1.24.1-1","1.25.0-1","1.25.0-2","1.25.1-1","1.25.2-1","1.26.0-1","1.26.0-2","1.26.0-3","1.26.0-4"]},{"source":"osv","ecosystem":"Debian:13","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.1-1+deb13u2"}]}],"versions":["1.24.1-1","1.24.1-1+deb13u1"]},{"source":"osv","ecosystem":"Debian:14","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.25.2-1"}]}],"versions":["1.24.1-1","1.25.0-1","1.25.0-2","1.25.1-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.5-1","1.6.1-1","1.7-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.2-3build1","1.7.2-65-g2b8e6cf-1","1.8.1-1","1.8.1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.0-1","1.10.0-1build1","1.11.0-1","1.12.0-2","1.12.0-3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.0-1","1.16.1-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.20.0-1","1.21.0-1","1.22.0-1","1.22.0-1build1","1.22.0-1build3","1.22.0-1build4"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.0-3","1.24.1-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.25.1-1","1.25.2-1","1.25.2-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.1-1","1.25.0-2","1.25.1-1"]}],"products":[{"vendor":"pgbouncer","product":"pgbouncer"}],"references":[{"url":"https://www.pgbouncer.org/changelog.html#pgbouncer-125x","tags":["Release Notes","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6664","tags":["web"]},{"url":"https://github.com/advisories/GHSA-pmgp-q838-fh9g"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-6664","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-6664","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-6664","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-6664","title":"PgBouncer integer overflow in PgBouncer network packet parsing","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T00:43:42.64Z","modified":"2026-05-11T14:28:49.277Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T13:49:53.818886Z"}],"euvd":[{"id":"EUVD-2026-28876","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T00:43:42Z","modified":"2026-05-11T14:28:49Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T19:05:11.205633Z"}],"ghsa":[{"id":"GHSA-pmgp-q838-fh9g","title":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary...","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T03:31:21Z","modified":"2026-05-09T03:31:22Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T15:07:58.197878Z"}],"nvd":[{"id":"CVE-2026-6664","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T01:16:08.863Z","modified":"2026-07-24T08:10:00.15Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-190"],"updated_at":"2026-11-02T14:12:18.239974Z"}],"osv":[{"id":"DEBIAN-CVE-2026-6664","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T01:16:08.863Z","modified":"2026-10-01T03:02:43.826455587Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:58.699079Z"},{"id":"UBUNTU-CVE-2026-6664","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T01:16:00Z","modified":"2026-10-17T13:00:35.241182542Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:53.710209Z"},{"id":"AZL-86234","title":"CVE-2026-6664 affecting package pgbouncer for versions less than 1.25.2-1","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-09T01:16:08Z","modified":"2026-08-28T17:56:50.250758Z","updated_at":"2026-11-02T15:28:10.677811Z"},{"id":"BIT-pgbouncer-2026-6664","title":"PgBouncer integer overflow in PgBouncer network packet parsing","description":"An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.","status":"published","published":"2026-05-12T08:52:50.459Z","modified":"2026-09-08T08:48:24.742455778Z","updated_at":"2026-11-02T15:28:34.343258Z"}]}}