What is CVE-2026-16239?

CVE-2026-16239 is a high-severity vulnerability in Postgresql, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2026-08-13.

How severe is CVE-2026-16239?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Postgresql

CVE-2026-16239

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…

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

N/a Postgresql — versions 18, 17, 16

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Frequently asked questions

What is CVE-2026-16239?: CVE-2026-16239 is a high-severity vulnerability in Postgresql, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2026-08-13.
How severe is CVE-2026-16239?: High severity. CVSS v3 base score is 8.8 out of 10.