CVE-2026-2003 PostgreSQL oidvector discloses a few bytes of memory

What is CVE-2026-2003?

CVE-2026-2003 is a medium-severity vulnerability in Postgresql Postgresql, published on 12 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Improper validation of type "oidvector" in PostgreSQL allows a database user to disclose a few bytes of server memory. We have not ruled out viability of attacks that arrange for presence of confidential information in disclosed bytes, but they seem unlikely. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.

Weakness: CWE-1287

Which versions are affected by CVE-2026-2003?

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

Products include Postgresql Postgresql.

How do I fix CVE-2026-2003?

Upgrade postgresql to a fixed version for your release line: 14.21.0, 15.16.0, 16.12.0 or 17.8.0.

Is CVE-2026-2003 being exploited?

There is no known exploitation of CVE-2026-2003 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-2026-2003, AZL-77420, AZL-77580, BELL-CVE-2026-2003, BIT-postgresql-2026-2003, CLEANSTART-2026-XG48192 and 13 more.