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Medium 4.3
PgBouncer missing authorization check in KILL_CLIENT admin command
PgBouncer before 1.25.2 did not perform an appropriate authorization check for the KILL_CLIENT admin command. All users with access to the administration console (which itself requires authorization) could run this command. It would have been correct to allow…
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Medium 5.9CVE-2026-6666 Public exploit
PgBouncer crash in kill_pool_logins_server_error
A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.
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High 8.1
PgBouncer buffer overflow in SCRAM
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 ove…
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High 7.5CVE-2026-6664 Public exploit
PgBouncer integer overflow in PgBouncer network packet parsing
An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.
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High 7.5
Untrusted search path in auth_query connection in PgBouncer
Untrusted search path in auth_query connection handler in PgBouncer before 1.25.1 allows an unauthenticated attacker to execute arbitrary SQL during authentication via a malicious search_path parameter in the StartupMessage.