CVE-2026-18447: PostgreSQL output parameter type confusion executes arbitrary code

Published Nov 12, 2026
·
Updated

Type confusion in PostgreSQL SQL-language functions allows an object creator to execute arbitrary code as the operating system user running the database, via an output parameter of type "any". Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade PostgreSQL to a version that resolves this vulnerability.

    Fixed in 18.7
  2. Upgrade

    Upgrade PostgreSQL to a version that resolves this vulnerability.

    Fixed in 17.12
  3. Upgrade

    Upgrade PostgreSQL to a version that resolves this vulnerability.

    Fixed in 16.16
  4. Upgrade

    Upgrade PostgreSQL to a version that resolves this vulnerability.

    Fixed in 15.20
  5. Upgrade

    Upgrade PostgreSQL to a version that resolves this vulnerability.

    Fixed in 14.25

Event History

Nov 12, 2026
CVE Published
via MITRE·02:15 PM
Data Sourced
via MITRE·02:15 PM
DescriptionSeverityWeakness

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