CVE-2026-116489

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.

References

https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes

https://github.com/timescale/pgvectorscale/releases/tag/0.9.1

https://github.com/timescale/pgvectorscale/pull/280

https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd

https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa

https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81

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/mod.rs#L208-L231

https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253

https://github.com/timescale/pgvectorscale

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109907

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS