{"id":"UBUNTU-CVE-2026-54291","details":"pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle protection the setting is meant to guarantee. An attacker who can intercept the TLS connection can trigger the downgrade with a certificate whose signature algorithm has no tls-server-end-point channel-binding hash, because the bundled com.ongres.scram:scram-client returns an empty byte array instead of failing and pgJDBC ScramAuthenticator checks only that the server advertised a PLUS mechanism, without rejecting the empty binding or checking that the negotiated mechanism uses channel binding. This issue is fixed in version 42.7.12.","modified":"2026-07-11T00:15:05.859894873Z","published":"2026-07-06T19:17:00Z","upstream":["CVE-2026-54291"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-54291"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-54291"},{"type":"REPORT","url":"https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-j92g-9f8w-j867"},{"type":"REPORT","url":"https://github.com/ongres/scram/releases/tag/3.3"},{"type":"REPORT","url":"https://github.com/pgjdbc/pgjdbc/commit/77df98e4e66c12936ded3478a0954f6f580bad99"}],"affected":[{"package":{"name":"libpgjava","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2-1002-1"],"ecosystem_specific":{"binaries":[{"binary_version":"9.2-1002-1","binary_name":"libpg-java"},{"binary_version":"9.2-1002-1","binary_name":"libpostgresql-jdbc-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2-1002-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpg-java","binary_version":"9.2-1002-1"},{"binary_name":"libpostgresql-jdbc-java","binary_version":"9.2-1002-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.4.1212-1","9.4.1212-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"9.4.1212-1ubuntu0.1~esm1","binary_name":"libpostgresql-jdbc-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["42.2.6-1","42.2.8-1","42.2.9-1","42.2.10-1","42.2.10-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"42.2.10-1ubuntu0.1~esm1","binary_name":"libpostgresql-jdbc-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["42.2.23-1","42.2.24-1","42.3.1-1","42.3.2-1","42.3.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpostgresql-jdbc-java","binary_version":"42.3.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["42.5.4-1","42.6.0-2","42.7.0-1","42.7.1-1","42.7.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpostgresql-jdbc-java","binary_version":"42.7.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["42.7.5-1","42.7.5-2","42.7.7-1"],"ecosystem_specific":{"binaries":[{"binary_version":"42.7.7-1","binary_name":"libpostgresql-jdbc-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}},{"package":{"name":"libpgjava","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libpgjava?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["42.7.7-1","42.7.8-1","42.7.8-2","42.7.9-1","42.7.10-1"],"ecosystem_specific":{"binaries":[{"binary_version":"42.7.10-1","binary_name":"libpostgresql-jdbc-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-54291.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}