{"id":"UBUNTU-CVE-2026-19888","details":"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.","modified":"2026-09-25T06:36:18.850423626Z","published":"2026-09-24T00:00:00Z","upstream":["CVE-2026-19888"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19888"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-19888"},{"type":"REPORT","url":"https://www.pgbouncer.org/changelog.html"}],"affected":[{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.5-1","1.6.1-1","1.7-1"],"ecosystem_specific":{"binaries":[{"binary_name":"pgbouncer","binary_version":"1.7-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19888.json"}},{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=bionic"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"pgbouncer","binary_version":"1.8.1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19888.json"}},{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=focal"},"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"],"ecosystem_specific":{"binaries":[{"binary_version":"1.12.0-3","binary_name":"pgbouncer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19888.json"}},{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.0-1","1.16.1-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.16.1-1ubuntu1","binary_name":"pgbouncer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19888.json"}},{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=noble"},"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"],"ecosystem_specific":{"binaries":[{"binary_name":"pgbouncer","binary_version":"1.22.0-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19888.json"}},{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.24.1-1","1.25.0-2","1.25.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"pgbouncer","binary_version":"1.25.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-19888.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}