{"affected":[{"defaultStatus":"unaffected","product":"pgvectorscale","source":"CNA: VulnCheck","vendor":"timescale","versions":[{"lessThan":"0.9.1","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-116489","cwes":["CWE-843"],"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.","epss":{"date":"2026-11-04","percentile":0.4282,"score":0.00498},"exploits":[],"kev":null,"metrics":[{"score":7.7,"severity":"high","source":"CNA: VulnCheck","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","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},{"score":7.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793809063390,"publishedAt":1793026778170,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/timescale/pgvectorscale/pull/280"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/mod.rs#L208-L231"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/pg_vector.rs#L133-L151"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/timescale/pgvectorscale/releases/tag/0.9.1"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/timescale/pgvectorscale"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/mod.rs#L208-L231"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/pg_vector.rs#L133-L151"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/pull/280"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/timescale/pgvectorscale/releases/tag/0.9.1"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/timescale/pgvectorscale/pull/280"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd"}],"revision":"29d48519ca174f20633f95ccb516145a7f9f52a29badcd766e1093aa0e8f20e5","sources":[{"modifiedAt":1793808132074,"name":"CNA: VulnCheck","retrievedAt":1793808592612,"url":"https://www.cve.org/CVERecord?id=CVE-2026-116489"},{"modifiedAt":1793809063390,"name":"NVD","retrievedAt":1793816323457,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116489"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793808599202,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-116489"}],"ssvc":{"assessedAt":1793808123659,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes","updatedAt":1793816323457}