CVE-2026-14664 PostgreSQL regexp heap buffer overflow executes arbitrary code

What is CVE-2026-14664?

CVE-2026-14664 is a high-severity memory corruption vulnerability in Postgresql Postgresql, published on 13 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Heap buffer overflow in PostgreSQL regexp allows the query author to execute arbitrary code as the operating system user running the database, via text that would not pass encoding validation. This shares heritage with CVE-2026-2006, but this case involved unanticipated data growth when round-tripped through pg_wchar. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

Weakness: CWE-122

Which versions are affected by CVE-2026-14664?

1 open source package ship an affected version, including postgresql. It affects 1 product.

Products include Postgresql Postgresql.

How do I fix CVE-2026-14664?

Upgrade postgresql to a fixed version for your release line: 14.24.0, 15.19.0, 16.15.0 or 17.11.0.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-14664 being exploited?

There is no known exploitation of CVE-2026-14664 in the wild and no public exploit code.

Other vulnerabilities in Postgresql Postgresql

• CVE-2013-1902 Information disclosure in n/a Critical 10.0
• CVE-2013-1903 Information disclosure in n/a Critical 10.0
• CVE-2007-3279 Privilege escalation in n/a Critical 10.0
• CVE-2002-1399 Integer overflow in n/a Critical 10.0
• CVE-2016-3065 Information disclosure in n/a Critical 9.1

All Postgresql Postgresql vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2026-14664, AZL-95729, BELL-CVE-2026-14664, BIT-postgresql-2026-14664, DEBIAN-CVE-2026-14664, ECHO-6b80-2a37-278b and 9 more.