CVE-2026-2006Network attack vector

Authenticated code execution via unchecked multibyte lengths

Published Feb 12, 2026 · Updated Feb 12, 2026

Buffer overrun in PostgreSQL allows remote authenticated users to execute arbitrary code on the database server through crafted SQL. Core text routines used pg_mblen() and COPYCHAR without buffer bounds, allowing incomplete multibyte sequences to overrun string buffers. A valid database login and query execution are required; affected releases precede 18.2, 17.8, 16.12, 15.16, and 14.21.

CVSS severity8.8
High
EPSS probability1.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overrun in PostgreSQL allows remote authenticated users to execute arbitrary code on the database server through crafted SQL. Core text routines used pg_mblen() and COPYCHAR without buffer bounds, allowing incomplete multibyte sequences to overrun string buffers. A valid database login and query execution are required; affected releases precede 18.2, 17.8, 16.12, 15.16, and 14.21.

The record

CVE
CVE-2026-2006
Published
Feb 12, 2026
Updated
Feb 12, 2026
Vendor
PostgreSQL Global Development Group
Product
PostgreSQL
Classifications
CWE-129, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 12, 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 <14.21
  2. Affected versionversion=15 <15.16
  3. Affected versionversion=16 <16.12
  4. Affected versionversion=17 <17.8
  5. Affected versionversion=18 <18.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PostgreSQL Global Development Group · PostgreSQLversion=0 <14.21; version=15 <15.16; version=16 <16.12; version=17 <17.8; version=18 <18.2

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-129Improper Validation of Array Index
T1190Exploit Public-Facing Application

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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