PostgreSQL: Type confusion in composite-value field assignment (CVE-2026-116306)
A type confusion vulnerability in PostgreSQL composite-value field assignment allows an object creator to execute arbitrary code as the operating system user running the database.
CVE search metadata
CVE search record: CVE-2026-116306. Severity: high. CVSS: 8.8. KEV: no. Product: PostgreSQL. Brief: PostgreSQL: Type confusion in composite-value field assignment (CVE-2026-116306). Brief link: https://feed.craftedsignal.io/briefs/2026-11-postgresql-type-confusion-cve-2026-116306/
Triage facts
Revision 1- Applicability
- PostgreSQL
- Evidence
- Unknown
- Severity
- High
- Sources
- 1 public source
- Freshness
- Revision 1Nov 12, 16:51 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
PostgreSQL is vulnerable to a type confusion issue within its composite-value field assignment logic, which can be triggered by changing a composite type between the deforming and reforming of a value. Successful exploitation allows an object creator to execute arbitrary code with the privileges of the operating system user running the database.