CVE-2026-6665

The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow.

More information : https://www.pgbouncer.org/changelog.html#pgbouncer-125x