PostgreSQL: Use-After-Free in dblink Extension (CVE-2026-120147)
A use-after-free vulnerability in the PostgreSQL dblink extension allows an object creator to execute arbitrary code as the operating system user running the database.
CVE search metadata
CVE search record: CVE-2026-120147. Severity: high. CVSS: 8.8. KEV: no. Product: PostgreSQL. Brief: PostgreSQL: Use-After-Free in dblink Extension (CVE-2026-120147). Brief link: https://feed.craftedsignal.io/briefs/2026-11-postgresql-dblink-uaf-cve-2026-120147/
Triage facts
Revision 1- Applicability
- PostgreSQL
- Evidence
- Unknown
- Severity
- High
- Sources
- 1 public source
- Freshness
- Revision 1Nov 12, 16:57 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
A use-after-free vulnerability exists in the PostgreSQL dblink extension (CVE-2026-120147). An object creator can 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.