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CVE-2026-14669

HighPublished

PostgreSQL to_char heap buffer overflow executes arbitrary code

Published: Aug 13, 2026
Updated: Aug 14, 2026
Assigning CNA: PostgreSQL
Evidence observed: Aug 18, 2026

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 50.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2026-14669Exploit
Proof-of-concept exploit for CVE-2026-14669, a PostgreSQL to_char() timezone abbreviation heap buffer overflow enabling RCE through information leak and ROP chain; includes Docker lab and automated PoC.

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