CVE-2026-15742Network attack vector

Authenticated code execution via Levenshtein integer wraparound

Published Aug 13, 2026 · Updated Aug 13, 2026

Integer wraparound in PostgreSQL fuzzystrmatch before 18.6, 17.11, 16.15, 15.19, and 14.24 allows remote authenticated users to execute code. Extreme cost inputs to levenshtein() or levenshtein_less_equal() wrap an integer calculation, causing writes across a huge range of process addresses. A valid database login and access to the trusted fuzzystrmatch extension are required, and successful exploitation runs code as the database service account.

CVSS severity8.8
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer wraparound in PostgreSQL fuzzystrmatch before 18.6, 17.11, 16.15, 15.19, and 14.24 allows remote authenticated users to execute code. Extreme cost inputs to levenshtein() or levenshtein_less_equal() wrap an integer calculation, causing writes across a huge range of process addresses. A valid database login and access to the trusted fuzzystrmatch extension are required, and successful exploitation runs code as the database service account.

The record

CVE
CVE-2026-15742
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
PostgreSQL Global Development Group
Product
PostgreSQL
Classifications
CWE-190, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <14.24
  2. Affected versionversion=15 <15.19
  3. Affected versionversion=16 <16.15
  4. Affected versionversion=17 <17.11
  5. Affected versionversion=18 <18.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PostgreSQL Global Development Group · PostgreSQLversion=0 <14.24; version=15 <15.19; version=16 <16.15; version=17 <17.11; version=18 <18.5

Published CVSS scores

8.8PostgreSQL Global Development GroupCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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