Vulnerability in pgjdbc

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund20 Oct 2026WID-SEC-2026-4090

  Oracle Communications: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-101763CVE-2026-58389CVE-2026-56740+85 more CVEs
• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3665

  SOS GmbH JobScheduler: Multiple vulnerabilities allow an unspecified attack Translated from German

  CVE-2026-19032CVE-2026-59889CVE-2026-9563+7 more CVEs

[ References ]References

• github.com/pgjdbc/pgjdbc/security/advisories/GHSA-j92g-9f8w-j867x_refsource_CONFIRM
• github.com/pgjdbc/pgjdbc/commit/77df98e4e66c12936ded3478a0954f6f580bad99x_refsource_MISC
• github.com/ongres/scram/releases/tag/3.3x_refsource_MISC