{"id":"CVE-2026-116489","revision":"43bfa01ebd3c4c5bb3353fdf3a328abb","records":[{"revision":"43bfa01ebd3c4c5bb3353fdf3a328abb","observedAt":"2026-10-26T16:35:30.797+00:00","statement":{"source":"cve-program","id":"CVE-2026-116489","aliases":[],"title":"Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes","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.","state":0,"publishedAt":"2026-10-26T14:59:38.17+00:00","modifiedAt":"2026-10-26T14:59:38.17+00:00","affected":[{"ecosystem":"Vendor product","name":"pgvectorscale","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"timescale\",\n                    \"product\": \"pgvectorscale\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"0.9.1\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":7.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/timescale/pgvectorscale/pull/280","https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81","https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa","https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd","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/build.rs#L253","https://github.com/timescale/pgvectorscale/releases/tag/0.9.1","https://github.com/timescale/pgvectorscale","https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116489","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116489","identifiers":["CVE-2026-116489"]},"retained":false,"historicalAffected":[]}],"coverage":[]}