Improper Locking in PostgreSQL Startup Processing Exposes Unauthenticated Network Clients
CVE-2026-116322

5.3MEDIUM

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 November 2026

What is CVE-2026-116322?

An improper locking issue during the startup processing of PostgreSQL enables unauthenticated network clients to initiate a server restart. This vulnerability occurs when the authentication_timeout expires while the server holds a spinlock during the cancellation handling process. Affected versions include major version 18, specifically minor versions prior to PostgreSQL 18.7. It is crucial to upgrade to at least PostgreSQL 18.7 to mitigate this risk.

Affected Version(s)

PostgreSQL 18 < 18.7

References

https://www.postgresql.org/support/security/CVE-2026-116322/

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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