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CVE-2026-6470

PostgreSQL fails to check type USAGE privilege

MEDIUM
4.3
CVSS Score
Published: August 13, 2026 at 01:00 PM UTC
Updated: August 29, 2026 at 11:33 PM UTC
1 product affected across 1 vendorPostgreSQL

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Missing authorization in PostgreSQL DDL commands allows an object creator to achieve denial of service against ALTER and DROP of the type, via creating a dependency on the type. Many DDL operations did check the privilege, but assigning a range subtype and referencing the type from an SQL expression did not. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

PostgreSQL· PostgreSQL
95%
v < 14.2414.0 ≤ v < 14.2415 ≤ v < 15.1915.0 ≤ v < 15.1916 ≤ v < 16.1516.0 ≤ v < 16.1517 ≤ v < 17.1117.0 ≤ v < 17.1118 ≤ v < 18.618.0 ≤ v < 18.515161718
Affected range stops below 14.24, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.19, so it looks safe — our inference, not a vendor statement
Affected range stops below 16.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://www.postgresql.org/support/security/CVE-2026-6470/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMPostgreSQL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-862

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