# CVE-2026-116489: Timescale pgvectorscale type confusion in DiskANN indexing

Source: https://junglewise.ai/threats/cve-2026-116489-timescale-pgvectorscale-before-0-9-1-contains-a-type-confusion  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-26. Updated: 2026-10-26  
License: CC BY 4.0 with a link back

CVE-2026-116489 · Severity: high · CVSS 7.5 · Published 2026-10-26

pgvectorscale is a PostgreSQL extension for vector search and indexing. A type confusion vulnerability allows database users with CREATE privileges to corrupt memory, crash the server, or escalate privileges by constructing malicious vector data and DiskANN indexes.

Vendors: [Timescale](https://junglewise.ai/threats/vendors/timescale).

## Quick answers

**Is CVE-2026-116489 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116489 being exploited in the wild.

**How severe is CVE-2026-116489?** High severity, with a CVSS score of 7.5, published 26 October 2026.

**Which products and versions are affected?** Timescale Pgvectorscale before 0.9.1.

**Is there a fix for CVE-2026-116489?** Yes: fixed in 0.9.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116489 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116489?** Check whether you run Timescale Pgvectorscale at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 0.9.1

## Technical details

A type confusion vulnerability in pgvectorscale before 0.9.1 allows low-privileged database users with CREATE privilege on the vectorscale schema to shadow pgvector's vector type or operators. Attackers can pre-create shadow objects and build or query DiskANN indexes over crafted values, causing out-of-bounds reads and writes that lead to memory disclosure, server crashes, or privilege escalation.

## Affected products

- Timescale pgvectorscale before 0.9.1

## Timeline

- 2026-10-26: disclosed

## References

- [https://github.com/timescale/pgvectorscale](https://github.com/timescale/pgvectorscale)
- [https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs](https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs)