Description
Inconsistent transition-capture state in PostgreSQL MERGE allows a table data modifier to make an AFTER trigger process the wrong new row, via a partitioned table MERGE that performs an INSERT before an UPDATE. Within major versions 15-18, minor versions before PostgreSQL 18.7, 17.12, 16.16, and 15.20 are affected. Versions before PostgreSQL 15 are unaffected.
Published: 2026-11-12
Score: 5.4 Medium
EPSS: n/a
KEV: No
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History

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

Type Values Removed Values Added
Description Inconsistent transition-capture state in PostgreSQL MERGE allows a table data modifier to make an AFTER trigger process the wrong new row, via a partitioned table MERGE that performs an INSERT before an UPDATE. Within major versions 15-18, minor versions before PostgreSQL 18.7, 17.12, 16.16, and 15.20 are affected. Versions before PostgreSQL 15 are unaffected.
Title PostgreSQL MERGE can place the wrong row in a trigger transition table
Weaknesses CWE-1250
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'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: PostgreSQL

Published:

Updated: 2026-11-12T14:15:06.946Z

Reserved: 2026-10-26T03:52:44.052Z

Link: CVE-2026-116312

cve-icon Vulnrichment

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cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-12T15:17:39.190

Modified: 2026-11-12T19:02:35.830

Link: CVE-2026-116312

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-1250

    Improper Preservation of Consistency Between Independent Representations of Shared State