What is GHSA-63j6-rm8q-mhqx?

GHSA-63j6-rm8q-mhqx is a security advisory published by GitHub Security Advisories with High severity. Use after free in the PostgreSQL dblink extension allows an object creator to execute arbitrary...

Which CVE IDs does GHSA-63j6-rm8q-mhqx cover?

GHSA-63j6-rm8q-mhqx covers the following CVE IDs: CVE-2026-120147. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-63j6-rm8q-mhqx?

GHSA-63j6-rm8q-mhqx has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

GHSA-63j6-rm8q-mhqxHighCVSS 8.8

Use after free in the PostgreSQL dblink extension 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-2026-120147 →

📋 Description

Use after free in the PostgreSQL dblink extension allows an object creator to execute arbitrary code as the operating system user running the database, via type conversion code that re-enters dblink and closes a connection whose results an outer dblink call is reading. 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-2026-120147
https://www.postgresql.org/support/security/CVE-2026-120147
https://github.com/advisories/GHSA-63j6-rm8q-mhqx