CVE-2026-16239
PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operating system user running the database, via re-creation of a cursor or other portal with different types. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
| CWE | CWE-843 |
| Vendor | n/a |
| Product | postgresql |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
n/a / PostgreSQL
18 < 18.5 17 < 17.11 16 < 16.15 15 < 15.19 0 < 14.24
References
Credits
The PostgreSQL project thanks Ben Morris (Claude and Anthropic Research) for reporting this problem.