Vulnerability in Timescale Pgvectorscale
CVE-2026-116489
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/timescale/pgvectorscale/pull/280 (issue-tracking, patch)
- github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8… (patch)
- github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05c… (patch)
- github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb5… (patch)
- github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/m… (technical-description)
- github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/p… (technical-description)
- github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/b… (technical-description)
- github.com/timescale/pgvectorscale/releases/tag/0.9.1 (release-notes)
- github.com/timescale/pgvectorscale (product)
- www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusio… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116489?
- CVE-2026-116489 is a high-severity vulnerability in Timescale Pgvectorscale, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 7.5/10. Published 2026-10-26.
- How severe is CVE-2026-116489?
- High severity. CVSS v3 base score is 7.5 out of 10.