{"id":"CVE-2026-116489","state":"PUBLISHED","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.","publishedAt":"2026-10-26T14:59:38.170Z","updatedAt":"2026-10-26T14:59:38.170Z","severity":{"score":7.7,"label":"High","version":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["timescale pgvectorscale"],"affected":[{"vendor":"timescale","product":"pgvectorscale","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.9.1","versionType":"semver"}]}],"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"],"weaknesses":["CWE-843"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116489.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116489","state":"PUBLISHED","datePublished":"2026-10-26T14:59:38.170Z","dateUpdated":"2026-10-26T14:59:38.170Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-26T11:37:39.154Z"},"containers":{"cna":{"title":"Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes","descriptions":[{"lang":"en","value":"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. 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