PostgreSQL Logical Decoding Vulnerability Affecting Multiple Versions
CVE-2026-6471

7.2HIGH

Key Information:

Vendor

PostgreSQL
Status
Postgresql
Vendor
CVE Published:
13 August 2026

Badges

👾 Exploit Exists🟡 Public PoC📰 News Worthy

What is CVE-2026-6471?

A security vulnerability exists in PostgreSQL's logical decoding feature, where a non-superuser with REPLICATION privileges can exploit missing authorization. This flaw enables the execution of arbitrary code by allowing access to any file that is visible to the operating system account running the PostgreSQL server through a selectively chosen logical decoding plugin. The vulnerability impacts multiple versions of PostgreSQL, necessitating immediate attention and remediation through updates.

Affected Version(s)

PostgreSQL 18 < 18.6

PostgreSQL 17 < 17.11

PostgreSQL 16 < 16.15

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6471
Created by HORKimhab

News Articles

favicon imageThe Hacker News

PostgreSQL Fixes 12-Year-Old Logical Decoding Flaw Enabling Replication-Role Code Execution

PostgreSQL fixes CVE-2026-6471, which lets replication accounts load libraries and run code when logical WAL is enabled.

14 hours ago

References

https://www.postgresql.org/support/security/CVE-2026-6471/

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by The Hacker News

  • Vulnerability published

  • Vulnerability Reserved

Credit

The PostgreSQL project thanks Vladimir Tokarev and Yu Kunpeng for reporting this problem.
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