Stack-based buffer overflow in PostgreSQL - CVE-2026-14679
Published: August 15, 2026
Vulnerability identifier: #VU142629
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-14679
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service and modify server memory.
The vulnerability exists due to stack-based buffer overflow in PostgreSQL argument name matching when processing crafted OUT parameter counts. A remote attacker can create an object with crafted parameters to cause a denial of service and modify server memory.
The memory write is limited to 0x0 and 0x1 byte values.
Affected software
PostgreSQL
Debian Linux
postgresql-17 (Debian package)
Debian Linux
postgresql-17 (Debian package)
How to mitigate CVE-2026-14679
Install security update from vendor's website.
PostgreSQL - addressed in versions 14.24, 15.19, 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