CVE-2026-14669

PostgreSQL to_char heap buffer overflow executes arbitrary code

Heap buffer overflow in PostgreSQL to_char(timestamptz) allows the party choosing the timezone to execute arbitrary code as the operating system user running the database, via a long POSIX timezone abbreviation. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Affected

PostgreSQL

CVSS v3.1 CNA

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.66% chance of exploitation in the next 30 days, 51st percentile

Published

2026-08-13

Updated

2026-08-29

Proof-of-concept exploits (1)

• HackSpeak/CVE-2026-146693★ · 2026-08-18

Security advisories

• https://www.postgresql.org/support/security/CVE-2026-14669

References

• CVE Record
• NVD entry

Related

• CVE-2026-16232
• CVE-2026-17106
• CVE-2026-17349
• CVE-2026-17351
• CVE-2026-17566
• CVE-2026-46316