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Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck

CVE-2026-116489Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes

High 7.5

In plain English

A high-severity type confusion in pgvectorscale from timescale. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 57.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Timescale pgvectorscale before 0.9.1 contains a type confusion vulnerability that allows low-privileged database users to corrupt memory by shadowing pgvector's vector type or operators. Attackers with CREATE privilege on the vectorscale schema can pre-create shadow objects, then build and query DiskANN indexes over crafted values to cause out-of-bounds reads and writes, disclosing memory, crashing the server, or escalating privileges.

Affected products (as reported)

VendorProductVersions
timescale pgvectorscale 0 – before 0.9.1

Weakness: CWE-843 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References