CVE-2026-116303
PostgreSQL foreign key and JSON conversions bypass EXECUTE privilege on cast functions
Missing authorization in PostgreSQL type conversion allows a database user to invoke a cast function despite lacking EXECUTE privilege on that function, via foreign keys, to_json(), and others. A successful attack requires the attacker to search each database for access-restricted cast functions and identify confidentiality impact specific to each function implementation found. There are few or no practical examples of an access-restricted cast function or of a cast function having confidentiality impact. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| PostgreSQL n/a |
≥ 18; < 18.7 (affected, rpm) ≥ 17; < 17.12 (affected, rpm) ≥ 16; < 16.16 (affected, rpm) ≥ 15; < 15.20 (affected, rpm) ≥ 0; < 14.25 (affected, rpm) Other versions: unaffected |
CNA: PostgreSQL |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 3.1 low |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N | CNA: PostgreSQL |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.postgresql.org/support/security/CVE-2026-116303/CNA: PostgreSQL
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