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PostgreSQL CVE-2026-6476

| EUVDEUVD-2026-30285 HIGH
SQL Injection (CWE-89)
2026-05-14 PostgreSQL GHSA-9crw-q654-rwgr
PostgreSQL SQLi Suse
7.2
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
7.2 HIGH
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SUSE
HIGH
qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

3
Patch available
May 14, 2026 - 15:01 EUVD
Analysis Generated
May 14, 2026 - 14:01 vuln.today
CVE Published
May 14, 2026 - 13:00 nvd
HIGH 7.2

DescriptionCVE.org

SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to execute arbitrary SQL as a superuser. The attack takes effect when pg_createsubscriber next runs. Within major versions 17 and 18, minor versions before PostgreSQL 18.4 and 17.10 are affected. Versions before PostgreSQL 17 are unaffected.

AnalysisAI

SQL injection in PostgreSQL's pg_createsubscriber utility escalates privileges from pg_create_subscription to superuser, enabling arbitrary SQL execution. Affects PostgreSQL versions 17.0-17.9 and 18.0-18.3; exploitation requires high-privilege access (pg_create_subscription rights) but occurs remotely without additional complexity. Attack triggers when pg_createsubscriber next executes. Fixed in PostgreSQL 18.4 and 17.10. No CISA KEV listing or public exploit identified at time of analysis, but the technical simplicity (AC:L) and privilege escalation nature present moderate risk for multi-tenant or hosted PostgreSQL environments where subscription management permissions are delegated.

Technical ContextAI

PostgreSQL's pg_createsubscriber is a utility introduced in version 17 that converts a physical standby server into a logical replica. The tool manages logical replication subscriptions, which require pg_create_subscription privilege. This vulnerability (CWE-89: SQL Injection) stems from insufficient input sanitization when processing subscription-related parameters. An attacker with pg_create_subscription rights can inject malicious SQL payloads that execute with superuser privileges during pg_createsubscriber's next invocation. The privilege boundary between subscription creation (typically granted to replication administrators) and superuser (full database control) is a critical security boundary in PostgreSQL's role-based access model. The vulnerability exists only in the pg_createsubscriber codepath introduced in major version 17, explaining why earlier versions are unaffected.

RemediationAI

Upgrade to PostgreSQL 18.4 or later for version 18 users, or PostgreSQL 17.10 or later for version 17 users. These releases contain patches addressing the SQL injection vulnerability in pg_createsubscriber. Download patched versions from https://www.postgresql.org/download/ and follow standard PostgreSQL upgrade procedures for your deployment model. For organizations unable to immediately patch, implement compensating controls: (1) Audit and restrict pg_create_subscription privilege to only fully trusted administrators who already possess superuser-equivalent access, eliminating the privilege escalation boundary; (2) Monitor pg_createsubscriber invocations through PostgreSQL query logs (log_statement='all') and audit trails to detect anomalous SQL patterns; (3) If pg_createsubscriber is not operationally required, remove execute permissions on the utility binary as a temporary measure (note this breaks standby-to-logical-replica conversion workflows). Complete advisory and patching guidance available at https://www.postgresql.org/support/security/CVE-2026-6476/. Compensating controls reduce but do not eliminate risk; prioritize patching for production systems.

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

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CVE-2026-6476 vulnerability details – vuln.today
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