CVE-2026-2004: PostgreSQL intarray missing validation of type of input to selectivity estimator executes arbitrary code

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-12 · updated 2026-07-15
Weakness: CWE-1287

Description

Missing validation of type of input in PostgreSQL intarray extension selectivity estimator function allows an object creator to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.

Affected products

PostgreSQL: from 14.0 before 14.21; from 15.0 before 15.16; from 16.0 before 16.12; from 17.0 before 17.8; from 18.0 before 18.2 — fixed in 14.21, 15.16, 16.12, 17.8, 18.2

How to fix

Upgrade to a fixed version: PostgreSQL 14.21, 15.16, 16.12, 17.8. Check the vendor advisory for mitigations.

References

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