CVE-2026-14679

PostgreSQL stack buffer overflow in argument match writes 0x0 and 0x1 to server memory

Published: 8/13/2026 Last updated: 8/29/2026 Reserved: 7/3/2026

Stack buffer overflow in PostgreSQL argument name matching allows an object creator to achieve unknown impacts via OUT parameter count. The attack can write only 0x0 and 0x1 bytes. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CNA assigner: PostgreSQL (f86ef6dc-4d3a-42ad-8f28-e6d5547a5007) Requested by: n/a

Metrics

Version	Score	Severity	Vector String
3.1	8.2	High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Opam packages affected (5)

conf-mingw-w64-postgresql-i686 conf-mingw-w64-postgresql-x86_64 conf-postgresql ocsigen-start postgresql

Products affected (0)

No product listed.

References (1)

https://www.postgresql.org/support/security/CVE-2026-14679/

Credits (1)

The PostgreSQL project thanks Zheng Yu (DepthFirst AI) and ylwangtju for reporting this problem.