{"id":"CVE-2026-19888","aliases":["AZL-103430","BIT-pgbouncer-2026-19888","DEBIAN-CVE-2026-19888","EUVD-2026-85365","GHSA-w79m-39mq-x36c","RHSA-2026:70698","UBUNTU-CVE-2026-19888"],"status":"published","title":"NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","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":"2026-11-12","score":0.00392,"percentile":0.33856,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2026-09-23T16:04:48Z","modified":"2026-11-02T14:15:38Z","fixes":[{"ecosystem":"Azure Linux:3","package":"pgbouncer","fixed_in":["1.26.0-1"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"pgbouncer","fixed_in":["1.26.0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pgbouncer","fixed_in":["1.26.0-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.0-1"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"pgbouncer","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.26.0"}]}]},{"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","1.26.0-5","1.26.0-6"]},{"source":"osv","ecosystem":"Debian:13","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.1-1","1.24.1-1+deb13u1","1.24.1-1+deb13u2","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","1.26.0-5","1.26.0-6"]},{"source":"osv","ecosystem":"Debian:14","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.0-1"}]}],"versions":["1.24.1-1","1.25.0-1","1.25.0-2","1.25.1-1","1.25.2-1"]},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"pgbouncer","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.26.0-0.1.hum1"}]}],"bundled":3},{"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: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"]}],"references":[{"url":"https://www.pgbouncer.org/changelog.html","tags":["web","article","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19888","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-w79m-39mq-x36c"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-19888","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:70698","tags":["advisory"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-6668","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-6669","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-19888","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_70698.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539548","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-6668","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6668","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539546","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-6669","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6669","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539545","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-19888","tags":["advisory","report"]},{"url":"https://ubuntu.com/security/CVE-2026-19888","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-19888","title":"NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T16:04:48.392Z","modified":"2026-09-23T16:46:13.585Z","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-476"],"updated_at":"2026-11-02T13:47:17.512524Z"}],"euvd":[{"id":"EUVD-2026-85365","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T16:04:48Z","modified":"2026-09-23T16:46:13Z","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":"2026-11-02T17:28:00.617613Z"}],"ghsa":[{"id":"GHSA-w79m-39mq-x36c","title":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer...","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T18:31:56Z","modified":"2026-09-23T18:32:05Z","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-476"],"updated_at":"2026-11-02T15:12:21.120874Z"}],"nvd":[{"id":"CVE-2026-19888","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T17:17:14.917Z","modified":"2026-09-23T19:40:10Z","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-476"],"updated_at":"2026-11-02T14:12:50.703874Z"}],"osv":[{"id":"DEBIAN-CVE-2026-19888","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T17:17:14.917Z","modified":"2026-10-04T17:00:08.700863534Z","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":"2026-11-02T15:45:53.097669Z"},{"id":"RHSA-2026:70698","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-09-25T10:15:08Z","modified":"2026-09-25T10:42:49.271036072Z","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":"2026-11-02T15:53:22.928316Z"},{"id":"UBUNTU-CVE-2026-19888","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T17:17:00Z","modified":"2026-10-17T12:58:46.850216207Z","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":"2026-11-02T16:56:01.334185Z"},{"id":"AZL-103430","title":"CVE-2026-19888 affecting package pgbouncer for versions less than 1.26.0-1","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-09-23T17:17:14Z","modified":"2026-11-02T14:15:38.821936849Z","updated_at":"2026-11-02T15:28:00.794214Z"},{"id":"BIT-pgbouncer-2026-19888","title":"NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer","description":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.","status":"published","published":"2026-10-01T09:30:57.797Z","modified":"2026-10-01T10:00:07.831583163Z","updated_at":"2026-11-02T15:28:34.343258Z"}]}}