PostgreSQL REINDEX CONCURRENTLY Vulnerability Affecting Multiple Versions
CVE-2026-116336

8.8HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
12 November 2026

What is CVE-2026-116336?

A vulnerability in PostgreSQL's REINDEX CONCURRENTLY functionality allows an object creator to execute arbitrary code. This can occur when an index expression attempts to issue DROP INDEX on a dropped index, enabling potential compromise of the operating system user that is executing the database. Affected versions include PostgreSQL 18.6 and earlier, as well as previous minor releases across multiple major versions.

Affected Version(s)

PostgreSQL 18 < 18.7

PostgreSQL 17 < 17.12

PostgreSQL 16 < 16.16

References

https://www.postgresql.org/support/security/CVE-2026-116336/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

The PostgreSQL project thanks Florent Saudel for reporting this problem.
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