CVE-2026-2003

PostgreSQL oidvector discloses a few bytes of memory

Published: 2/12/2026 Last updated: 2/12/2026 Reserved: 2/5/2026

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.

CNA assigner: PostgreSQL (f86ef6dc-4d3a-42ad-8f28-e6d5547a5007) Requested by: n/a

Metrics

Version	Score	Severity	Vector String
3.1	4.3	Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Opam packages affected (5)

conf-mingw-w64-postgresql-i686 conf-mingw-w64-postgresql-x86_64 conf-postgresql ocsigen-start postgresql

Products affected (1)

Product	Vendor	Version
PostgreSQL	n/a	13

References (1)

https://www.postgresql.org/support/security/CVE-2026-2003/

Credits (1)

The PostgreSQL project thanks Altan Birler for reporting this problem.