Observable discrepancy in PostgreSQL - CVE-2026-14672
Published: August 15, 2026
Vulnerability identifier: #VU142634
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-14672
CWE-ID: CWE-203
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper information exposure in the SCRAM authentication mechanism when handling authentication requests. A remote attacker can observe the SCRAM iteration count in the authentication challenge to disclose sensitive information.
The issue can be used to test whether a user exists only if the probed user has a non-default scram_iterations count.
Affected software
PostgreSQL
Debian Linux
postgresql-17 (Debian package)
Debian Linux
postgresql-17 (Debian package)
How to mitigate CVE-2026-14672
Install security update from vendor's website.
PostgreSQL - addressed in versions 16.15, 17.11, 18.5
postgresql-17 (Debian package) - update to 17.11-0+deb13u1
postgresql-17 (Debian package) - update to 17.11-0+deb13u1