Improper protection in PostgreSQL INSERT ... ON CONFLICT on auto-updatable views allows an attacker having INSERT and UPDATE privileges on the view to read and modify every row in the view's base table, via iterated INSERT ... ON CONFLICT DO UPDATE. This bypasses the view's WHERE condition, whether or not the view is a security_barrier view. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a PostgreSQL unaffected
Version Status Constraints
18 affected < 18.7
17 affected < 17.12
16 affected < 16.16
15 affected < 15.20
0 affected < 14.25

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Project Subscriptions

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.postgresql.org/support/security/CVE-2026-16237/ cve-icon cve-icon
History

Thu, 12 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
Description Improper protection in PostgreSQL INSERT ... ON CONFLICT on auto-updatable views allows an attacker having INSERT and UPDATE privileges on the view to read and modify every row in the view's base table, via iterated INSERT ... ON CONFLICT DO UPDATE. This bypasses the view's WHERE condition, whether or not the view is a security_barrier view. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.
Title PostgreSQL INSERT ... ON CONFLICT can read or modify rows despite auto-updatable view WHERE condition
Weaknesses CWE-424
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: PostgreSQL

Published:

Updated: 2026-11-12T21:42:02.923Z

Reserved: 2026-07-20T01:55:06.428Z

Link: CVE-2026-16237

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-12T15:17:50.030

Modified: 2026-11-12T22:19:21.690

Link: CVE-2026-16237

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses