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PostgreSQL EUVDEUVD-2026-57858

| CVE-2026-14671 HIGH
Access of Resource Using Incompatible Type (Type Confusion) (CWE-843)
2026-08-13 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 GHSA-c4j6-v5f3-8f3c
RCE PostgreSQL Memory Corruption Red Hat
8.8
CVSS 3.1 · Vendor: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
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Severity by source

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

Network vector confirmed by database access model; PR:L reflects required object creation privileges; S:U as OS user impact remains within PostgreSQL's security scope.

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

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

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

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Patch available
Aug 13, 2026 - 14:02 EUVD
Analysis Generated
Aug 13, 2026 - 13:35 vuln.today
CVE Published
Aug 13, 2026 - 13:17 cve.org
HIGH 8.8

DescriptionCVE.org

Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operating system user running the database. The fix for this emerged as a non-security bug report, and the fix appear in the git repository with subject "refint: Remove plan cache.", without a CVE number. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Articles & Coverage 2

News 18 New PostgreSQL Vulnerabilities - 18 High Severity, No POC Available Aug 14, 2026 News 18 New PostgreSQL Vulnerabilities - 18 High Severity, No POC Available Aug 13, 2026

AnalysisAI

Type confusion in PostgreSQL's 'refint' contrib module enables any low-privileged database user with object creation rights to execute arbitrary code as the operating system user hosting the PostgreSQL service. Affected are all active PostgreSQL branches prior to versions 18.5, 17.11, 16.15, 15.19, and 14.24. Notably, the fix was silently committed to the PostgreSQL git repository under the subject 'refint: Remove plan cache.' without a CVE assignment, meaning vulnerable installations may have remained unpatched far longer than typical because administrators had no security signal to act on. No public exploit has been identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog.

Technical ContextAI

The 'refint' module is a PostgreSQL contrib extension (installed separately from core) that enforces referential integrity using trigger functions. CWE-843 (Type Confusion) describes the root cause: the module's plan cache reuses cached execution plans across contexts that differ in type expectations, allowing an attacker who controls a database object to supply data of an unexpected type that the cached plan processes incorrectly. The fix - removing the plan cache entirely from refint - confirms that the cache was the confused component. Type confusion in a plan cache is a memory-corruption-class vulnerability because the mismatched type handling can overwrite adjacent memory structures, ultimately redirecting the PostgreSQL backend's execution flow. Since PostgreSQL backends execute as a dedicated OS user (commonly 'postgres'), successful exploitation yields OS-level code execution within that privilege context.

RemediationAI

Upgrade to PostgreSQL 18.5, 17.11, 16.15, 15.19, or 14.24 - whichever corresponds to the active branch in use - to apply the fix introduced by the 'refint: Remove plan cache.' commit. The vendor advisory is at https://www.postgresql.org/support/security/CVE-2026-14671/. As an immediate compensating control pending upgrade, revoke object creation privileges (CREATE on schemas or databases) from all untrusted or low-privilege database users; note that this may break application workflows that depend on dynamic object creation. If the 'refint' contrib module is not actively used, dropping the extension (DROP EXTENSION refint) eliminates the attack surface entirely with no functional impact to installations that don't depend on it. For cloud-managed PostgreSQL services (AWS RDS, Google Cloud SQL, Azure Database), verify with the provider that the patched minor version is available and apply it during the next maintenance window.

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Vendor StatusVendor

SUSE

Severity: Important
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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EUVD-2026-57858 vulnerability details – vuln.today
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