What is GHSA-76fw-fh4f-3w66?

GHSA-76fw-fh4f-3w66 is a security advisory published by GitHub Security Advisories with High severity. Type confusion in PostgreSQL SQL-language functions allows an object creator to execute arbitrary...

Which CVE IDs does GHSA-76fw-fh4f-3w66 cover?

GHSA-76fw-fh4f-3w66 covers the following CVE IDs: CVE-2026-18447. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-76fw-fh4f-3w66?

GHSA-76fw-fh4f-3w66 has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

GHSA-76fw-fh4f-3w66HighCVSS 8.8

Type confusion in PostgreSQL SQL-language functions allows an object creator to execute arbitrary...

Vendor

GitHub Security Advisories

Published

November 12, 2026

Last Modified

November 12, 2026

🔗 CVE IDs covered (1)

CVE-2026-18447 →

📋 Description

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.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-18447
https://www.postgresql.org/support/security/CVE-2026-18447
https://github.com/advisories/GHSA-76fw-fh4f-3w66