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PostgreSQL CVE-2026-6470

| EUVDEUVD-2026-57856 MEDIUM
Missing Authorization (CWE-862)
2026-08-13 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 GHSA-2pm8-9426-243p
PostgreSQL Denial Of Service Authentication Bypass
4.3
CVSS 3.1 · Vendor: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
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Severity by source

Vendor (f86ef6dc-4d3a-42ad-8f28-e6d5547a5007) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
vuln.today AI
4.3 MEDIUM

Authenticated low-privilege user (PR:L) exploits over the network (AV:N); impact is limited to availability of specific DDL operations (A:L) with no confidentiality or integrity effect.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative

Primary rating from Vendor (f86ef6dc-4d3a-42ad-8f28-e6d5547a5007).

CVSS VectorVendor: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

Lifecycle Timeline

3
Patch available
Aug 13, 2026 - 14:02 EUVD
Analysis Generated
Aug 13, 2026 - 13:48 vuln.today
CVE Published
Aug 13, 2026 - 13:19 cve.org
MEDIUM 4.3

DescriptionCVE.org

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.

AnalysisAI

Denial of service against PostgreSQL DDL operations is achievable by any authenticated database user who creates a custom type, exploiting missing authorization checks in two specific code paths - range subtype assignment and SQL expression type references. By manufacturing an artificial type dependency through these unguarded paths, a low-privileged user can permanently block administrators from executing ALTER TYPE or DROP TYPE on the affected object, disrupting schema maintenance across PostgreSQL versions 14 through 18 prior to their respective patched releases (14.24, 15.19, 16.15, 17.11, 18.5). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid PostgreSQL database account with sufficient privileges to execute CREATE TYPE or similar DDL statements in the target schema (PR:L per CVSS vector - a low-privilege authenticated user). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.3 Medium score with vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L accurately characterizes this as a constrained denial-of-service: network-accessible and low-complexity, but gated behind valid database credentials (PR:L) and producing only limited availability impact with zero confidentiality or integrity loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to the appropriate patched release for your major branch: PostgreSQL 18.5, 17.11, 16.15, 15.19, or 14.24, following your distribution's standard update procedure; the vendor security advisory is at https://www.postgresql.org/support/security/CVE-2026-6470/. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected

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CVE-2026-6470 vulnerability details – vuln.today
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