Use-after-free in PostgreSQL - CVE-2026-120152
Published: November 12, 2026
Vulnerability identifier: #VU166089
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-120152
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose memory contents from the PostgreSQL server.
The vulnerability exists due to use-after-free in PostgreSQL pg_show_all_settings() when scanning custom-variable placeholders that a module replaces and frees. A remote user can load a module while the scan is in progress to retrieve memory contents.
Affected software
PostgreSQL
How to mitigate CVE-2026-120152
Install security update from vendor's website.
PostgreSQL - addressed in versions 16.16, 17.12, 18.7