CVE-2026-14679 PUBLISHED

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

Assigner: PostgreSQL
Reserved: 03.07.2026 Published: 13.08.2026 Updated: 13.08.2026

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 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	n/a
Product	PostgreSQL
Versions	Default: unaffected affected from 18 to 18.5 (excl.) affected from 17 to 17.11 (excl.) affected from 16 to 16.15 (excl.) affected from 15 to 15.19 (excl.) affected from 0 to 14.24 (excl.)

Affected Configurations

attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema)

Credits

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

References

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

Problem Types

Stack-based Buffer Overflow CWE