CVE-2026-116489

Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes

Published Oct 26, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Timescale
Timescale pgvectorscale
Vendors & Products Timescale
Timescale pgvectorscale
Type Values Removed Values Added
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.
Title Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes
Weaknesses CWE-843
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 4, 2026, 4:02 PM
Reserved
Oct 26, 2026, 11:37 AM
Status
Awaiting Analysis
Published
Oct 26, 2026, 4:17 PM
Modified
Nov 4, 2026, 4:17 PM