What is CVE-2026-18893?

CVE-2026-18893 is a high-severity vulnerability in IBM Cockroachdb PostgreSQL For Vpc, classified under Improper Privilege Management. CVSS score: 7.1/10. Published 2026-11-08.

How severe is CVE-2026-18893?

High severity. CVSS v3 base score is 7.1 out of 10.

Privilege escalation in IBM Cockroachdb PostgreSQL For Vpc

CVE-2026-18893

IBM CockroachDB PostgreSQL for IBM VPC 26.2.0 through 26.2.3, 25.4.0 through 25.4.12, and 25.2.0 through 25.2.20 is vulnerable to privilege escalation via user-defined function.

Vulnerability class: Privilege Escalation

Published 2026-11-08 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Cockroachdb PostgreSQL For Vpc

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

www.ibm.com/support/pages/node/7293292 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-18893?: CVE-2026-18893 is a high-severity vulnerability in IBM Cockroachdb PostgreSQL For Vpc, classified under Improper Privilege Management. CVSS score: 7.1/10. Published 2026-11-08.
How severe is CVE-2026-18893?: High severity. CVSS v3 base score is 7.1 out of 10.