CVE-2026-116336

HIGH 8.8

PostgreSQL REINDEX CONCURRENTLY does not block DROP INDEX during index functions

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

Operation on a dropped index in PostgreSQL REINDEX CONCURRENTLY allows an object creator to execute arbitrary code as the operating system user running the database, via an index expression that issues DROP INDEX. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

CWE	CWE-843 CWE-672
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:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / PostgreSQL

18 < 18.7 17 < 17.12 16 < 16.16 15 < 15.20 0 < 14.25

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

The PostgreSQL project thanks Florent Saudel for reporting this problem.