CVE-2026-116303
PostgreSQL foreign key and JSON conversions bypass EXECUTE privilege on cast functions
Description
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.
INFO
Published Date :
Nov. 12, 2026, 2:15 p.m.
Last Modified :
Nov. 12, 2026, 2:15 p.m.
Remotely Exploit :
Yes !
Source :
PostgreSQL
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 | ||||
| CVSS 3.1 | LOW | MITRE-CVE |
Solution
- Update PostgreSQL to version 18.7 or later.
- Update PostgreSQL to version 17.12 or later.
- Update PostgreSQL to version 16.16 or later.
- Update PostgreSQL to version 15.20 or later.
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CVE-2026-116303 vulnerability anywhere in the article.