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PostgreSQL CVE-2026-14664

| EUVDEUVD-2026-57833 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-08-13 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 GHSA-p6pp-53vr-h4w8
RCE PostgreSQL Heap Overflow Buffer Overflow
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-accessible regexp engine exploitable by any authenticated SQL session; PR:L reflects mandatory credential requirement; full C/I/A impact limited to vulnerable database host (S:U).

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 - 13:32 vuln.today
CVE Published
Aug 13, 2026 - 13:17 cve.org
HIGH 8.8

DescriptionCVE.org

Heap buffer overflow in PostgreSQL regexp allows the query author to execute arbitrary code as the operating system user running the database, via text that would not pass encoding validation. This shares heritage with CVE-2026-2006, but this case involved unanticipated data growth when round-tripped through pg_wchar. 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

Heap buffer overflow in PostgreSQL's regexp engine allows any authenticated database user to execute arbitrary code as the operating system user running the database process. The flaw is triggered by specially crafted text that survives input validation but undergoes unanticipated data growth during internal round-trip conversion through the pg_wchar encoding layer, overflowing a heap-allocated buffer during regular expression evaluation. …

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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 privilege to issue SQL queries - specifically PR:L (any authenticated query author, not superuser). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 8.8 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects a network-accessible, low-complexity exploit requiring only a low-privileged database credential, with full confidentiality, integrity, and availability impact on the database server. … 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 The primary remediation is to upgrade PostgreSQL to the patched releases: 14.24, 15.19, 16.15, 17.11, or 18.5, as documented in the vendor advisory at https://www.postgresql.org/support/security/CVE-2026-14664/. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all PostgreSQL deployments and identify instances running affected versions (prior to 14.24, 15.19, 16.15, 17.11, or 18.5); assess database user privileges to understand exposure from authenticated access. …

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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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CVE-2026-14664 vulnerability details – vuln.today
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