CVE-2026-6665
PgBouncer buffer overflow in SCRAM
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.1EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
09 May 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
n/a · PgBouncer