Threats affecting pkg:github/timescale/pgvectorscale

CVE-2026-116489 is a type confusion vulnerability in timescale pgvectorscale versions before 0.9.1. It allows low-privileged database users with CREATE privilege on the vectorscale schema to corrupt memory by shadowing pgvector's vector type or operators. Exploitation involves pre-creating shadow objects and querying DiskANN indexes with crafted values, leading to out-of-bounds memory reads and writes. This can result in memory disclosure, server crashes, or privilege escalation. The vulnerability is fixed in version 0.9.1.