CVE-2026-116322

MEDIUM 5.3

PostgreSQL pre-authentication cancel request can leak a spinlock

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

Improper locking in PostgreSQL startup processing allows an unauthenticated network client to trigger a server restart, via arranging for authentication_timeout to arrive while it holds a spinlock during cancel handling. Within major version 18, minor versions before PostgreSQL 18.7 are affected. Versions before PostgreSQL 18 are unaffected.

CWE	CWE-667
Vendor	n/a
Product	postgresql
Ecosystems	Database
Industries	Technology
Published	Nov 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / PostgreSQL

18 < 18.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

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