---
title: "CVE-2026-116489: Timescale pgvectorscale - Type Confusion"
description: "Timescale pgvectorscale < 0.9.1 contains a type confusion vulnerability caused by shadowing pgvector's vector type or operators, letting low-privileged database users cause memory corruption, crash, or privilege escalation, exploit requires CREATE privilege on vectorscale schema."
url: https://panop.io/threat-heartbeat/CVE-2026-116489/
---

# CVE-2026-116489 Timescale pgvectorscale - Type Confusion

Timescale pgvectorscale < 0.9.1 contains a type confusion vulnerability caused by shadowing pgvector's vector type or operators, letting low-privileged database users cause memory corruption, crash, or privilege escalation, exploit requires CREATE privilege on vectorscale schema.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-116489)

## Details

Type

Type Confusion

Impact

Denial Of Service, Information Disclosure, Privilege Escalation

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-843](https://cwe.mitre.org/data/definitions/843.html)

## Vendor fix

Upgrade to version 0.9.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-116489](https://nvd.nist.gov/vuln/detail/CVE-2026-116489)
- [https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81](https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81)
- [https://github.com/timescale/pgvectorscale/pull/280](https://github.com/timescale/pgvectorscale/pull/280)
- [https://github.com/timescale/pgvectorscale/releases/tag/0.9.1](https://github.com/timescale/pgvectorscale/releases/tag/0.9.1)
- [https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes](https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes)
- [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#L253](https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253)
- [https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access\_method/mod.rs#L208-L231](https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/mod.rs#L208-L231)
- [https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access\_method/pg\_vector.rs#L133-L151](https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/pg_vector.rs#L133-L151)
- [https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa](https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa)
- [https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd](https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)