CVE-2026-15742

Name of the Vulnerable Software and Affected Versions PostgreSQL versions prior to 18.5 PostgreSQL versions prior to 17.11 PostgreSQL versions prior to 16.15 PostgreSQL versions prior to 15.19 PostgreSQL versions prior to 14.24

Description An integer wraparound in the fuzzystrmatch module allows a user to direct writes to a wide range of memory addresses. This can lead to the execution of arbitrary code with the privileges of the operating system user running the database. The issue is triggered by providing extreme inputs to the SQL functions levenshtein() or levenshtein less equal(). Integer wraparound occurs when an arithmetic operation results in a value too large for the designated integer type, causing it to wrap around to a minimum value.

Recommendations Update to version 18.5 or later. Update to version 17.11 or later. Update to version 16.15 or later. Update to version 15.19 or later. Update to version 14.24 or later. As a temporary mitigation, restrict the use of the levenshtein() and levenshtein less equal() functions.