Authorization Flaw in PostgreSQL Affects Data Security
CVE-2026-116311

5.4MEDIUM

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 November 2026

What is CVE-2026-116311?

A flaw in PostgreSQL’s authorization mechanism allows a user to remove their own data access restrictions under certain conditions. Specifically, through the DROP OWNED command, a role can bypass row level security policies intended to deniable access to sensitive data. This vulnerability affects PostgreSQL versions prior to 18.7, 17.12, 16.16, 15.20, and 14.25, enabling potential unauthorized data manipulation and retrieval.

Affected Version(s)

PostgreSQL 18 < 18.7

PostgreSQL 17 < 17.12

PostgreSQL 16 < 16.16

References

https://www.postgresql.org/support/security/CVE-2026-116311/

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

The PostgreSQL project thanks Zsolt Parragi and Anthropic OSS program for reporting this problem.
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