CVE-2026-16241 PostgreSQL ECPG integer underflow can crash the client

What is CVE-2026-16241?

CVE-2026-16241 is a low-severity vulnerability in Postgresql Postgresql, published on 13 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix. The client overwrites a huge memory region with bytes outside attacker knowledge or control. This typically yields a simple SIGSEGV, but rare cases might achieve client-specific integrity impact via the write. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

Weakness: CWE-191

Which versions are affected by CVE-2026-16241?

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

Products include Postgresql Postgresql.

How do I fix CVE-2026-16241?

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

Is CVE-2026-16241 being exploited?

There is no known exploitation of CVE-2026-16241 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-2026-16241, AZL-95711, BELL-CVE-2026-16241, BIT-postgresql-2026-16241, DEBIAN-CVE-2026-16241, ECHO-87ab-7830-3981 and 8 more.