IBM CockroachDB PostgreSQL VPC PrivEsc via UDF (26.2.3, 25.4.12, 25.2.20)
CVE-2026-18893 Published on November 8, 2026
CockroachDB PostgreSQL for IBM VPC is affected by multiple vulnerabilities
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 Analysis
CVE-2026-18893 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Improper Privilege Management
The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Products Associated with CVE-2026-18893
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Affected Versions
CockroachDB PostgreSQL for IBM VPC:- Version 26.2.0, <= 26.2.3 is affected.
- Version 25.4.0, <= 25.4.12 is affected.
- Version 25.2.0, <= 25.2.20 is affected.