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PostgreSQL CVE-2026-6474

| EUVDEUVD-2026-30280 MEDIUM
Use of Externally-Controlled Format String (CWE-134)
2026-05-14 PostgreSQL GHSA-qhm2-px33-58v8
Information Disclosure PostgreSQL Red Hat Suse
4.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
SUSE
MEDIUM
qualitative
Red Hat
4.3 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

3
Patch available
May 14, 2026 - 15:01 EUVD
Analysis Generated
May 14, 2026 - 14:02 vuln.today
CVE Published
May 14, 2026 - 13:00 nvd
MEDIUM 4.3

DescriptionCVE.org

Externally-controlled format string in PostgreSQL timeofday() function allows an attacker to retrieve portions of server memory, via crafted timezone zones. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

AnalysisAI

Format string vulnerability in PostgreSQL timeofday() function allows authenticated remote attackers to read arbitrary server memory by supplying crafted timezone values. Affects PostgreSQL versions 14.x before 14.23, 15.x before 15.18, 16.x before 16.14, 17.x before 17.10, and 18.x before 18.4. The vulnerability enables information disclosure of sensitive data stored in process memory without code execution or data modification capabilities.

Technical ContextAI

The timeofday() function in PostgreSQL fails to properly sanitize timezone parameters before passing them to format string operations, violating CWE-134 (Use of Externally-Controlled Format String). Format string vulnerabilities occur when untrusted input is used directly as a format string argument to functions like sprintf or printf, allowing attackers to read stack memory via format specifiers such as %x or %s. In this case, an authenticated user can manipulate timezone zone parameters supplied to timeofday() to inject format string sequences, causing the underlying C function to interpret attacker-controlled data as format directives rather than literal strings.

RemediationAI

Upgrade PostgreSQL to patched versions: 14.23 or later for the 14.x branch, 15.18 or later for the 15.x branch, 16.14 or later for the 16.x branch, 17.10 or later for the 17.x branch, or 18.4 or later for the 18.x branch. Refer to the PostgreSQL security advisory at https://www.postgresql.org/support/security/CVE-2026-6474/ for detailed upgrade instructions. As a temporary compensating control, restrict database user privileges to only those accounts that require legitimate access to the timeofday() function or time-related queries. In multi-tenant or shared-user environments where trust levels are low, consider revoking EXECUTE privileges on the timeofday() function from unprivileged application accounts until patching is completed; note that this may break legitimate time-dependent application functionality and should only be applied after confirming no production dependencies exist.

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Vendor StatusVendor

SUSE

Severity: Medium
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-2026-6474 vulnerability details – vuln.today
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