{"id":"UBUNTU-CVE-2026-107349","details":"An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as \"-c=\", makes the ignore_startup_parameters list lookup loop forever. Because PgBouncer serves all clients from a single process, this saturates a CPU core and makes PgBouncer unresponsive to all clients until the process is restarted.","modified":"2026-10-17T12:59:48.301311420Z","published":"2026-10-15T00:00:00Z","upstream":["CVE-2026-107349"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-107349"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-107349"},{"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_version":"1.7-1","binary_name":"pgbouncer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107349.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-2026-107349.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_name":"pgbouncer","binary_version":"1.12.0-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107349.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-2026-107349.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_version":"1.22.0-1build4","binary_name":"pgbouncer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107349.json"}},{"package":{"name":"pgbouncer","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/pgbouncer?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.25.1-1","1.25.2-1","1.25.2-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"pgbouncer","binary_version":"1.25.2-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107349.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-2026-107349.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"}]}