Medium 4.3Published Aug 11, 2023

CVE-2023-39418A vulnerability was found in PostgreSQL with the use of the MERGE command, which fails to test new rows against row security policies defined for UPDATE and SELECT.

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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It affects postgresql and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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A vulnerability was found in PostgreSQL with the use of the MERGE command, which fails to test new rows against row security policies defined for UPDATE and SELECT. If UPDATE and SELECT policies forbid some rows that INSERT policies do not forbid, a user could store such rows.

CVSS: 4.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-1220
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

postgresql postgresql postgresql:postgresql	from 15.0 before 15.4	NVD
redhat enterprise_linux redhat:enterprise_linux	8.0; 9.0	NVD
debian debian_linux debian:debian_linux	12.0	NVD

References

References

https://access.redhat.com/errata/RHSA-2023:7785	third-party-advisory
https://access.redhat.com/errata/RHSA-2023:7883	third-party-advisory
https://access.redhat.com/errata/RHSA-2023:7884	third-party-advisory
https://access.redhat.com/errata/RHSA-2023:7885	third-party-advisory
https://access.redhat.com/security/cve/CVE-2023-39418	third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2228112	issue-tracking, patch, third-party-advisory
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=cb2ae5741f2458a474ed3c31458d242e678ff229	mailing-list, patch
https://www.postgresql.org/support/security/CVE-2023-39418/	vendor-advisory
https://security.netapp.com/advisory/ntap-20230915-0002/
https://www.debian.org/security/2023/dsa-5553

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.