PostgreSQL pre-18.7/17.12/16.16/15.20/14.25 Type Confusion RCE via any output
CVE-2026-18447 Published on November 12, 2026
PostgreSQL output parameter type confusion executes arbitrary code
Type confusion in PostgreSQL SQL-language functions allows an object creator to execute arbitrary code as the operating system user running the database, via an output parameter of type "any". Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.
Vulnerability Analysis
Weakness Type
What is an Object Type Confusion Vulnerability?
The program allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
CVE-2026-18447 has been classified to as an Object Type Confusion vulnerability or weakness.
Products Associated with CVE-2026-18447
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Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.