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PostgreSQL CVE-2026-15742

| EUVDEUVD-2026-57847 HIGH
Integer Overflow or Wraparound (CWE-190)
2026-08-13 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 GHSA-rvq6-xp6x-5575
Integer Overflow PostgreSQL RCE
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

AV:N and AC:L because extreme SQL inputs are sendable remotely without special conditions; PR:L reflects mandatory database authentication; S:U as impact is bounded to the database backend OS process.

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
7.5 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 - 13:38 vuln.today
CVE Published
Aug 13, 2026 - 13:17 cve.org
HIGH 8.8

DescriptionCVE.org

Integer wraparound in PostgreSQL fuzzystrmatch allows a user to direct writes to a huge range of addresses, executing arbitrary code as the operating system user running the database, via extreme inputs to SQL function levenshtein() or levenshtein_less_equal(). 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

Remote code execution via integer wraparound in PostgreSQL's fuzzystrmatch contrib module allows any authenticated database user to corrupt memory and execute arbitrary code as the operating system account running the database server. All maintained PostgreSQL branches are affected: versions before 18.5, 17.11, 16.15, 15.19, and 14.24. …

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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 user account (CVSS PR:L confirmed) with EXECUTE privilege on levenshtein() or levenshtein_less_equal() - both granted to PUBLIC by default when the fuzzystrmatch extension is installed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, score 8.8) accurately captures the core risk: the attack is network-reachable, requires only a low-privilege database account, and results in full OS-level compromise. … 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 patched releases issued by the PostgreSQL Global Development Group: 18.5, 17.11, 16.15, 15.19, or 14.24, per the branch in use, as detailed at https://www.postgresql.org/support/security/CVE-2026-15742/. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all PostgreSQL instances running versions 14.23 or earlier, 15.18 or earlier, 16.14 or earlier, 17.10 or earlier, or 18.4 or earlier; audit database user access privileges and disable the fuzzystrmatch module if not required by critical applications. …

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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-2026-15742 vulnerability details – vuln.today
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