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    "cveMetadata": {
        "cveId": "CVE-2026-116489",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-26T11:37:39.154Z",
        "datePublished": "2026-10-26T14:59:38.170Z",
        "dateUpdated": "2026-10-26T14:59:38.170Z"
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                "dateUpdated": "2026-10-26T14:59:38.170Z"
            },
            "datePublic": "2026-09-04T00:00:00.000Z",
            "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. 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."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Access of Resource Using Incompatible Type ('Type Confusion')",
                            "cweId": "CWE-843",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "timescale",
                    "product": "pgvectorscale",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "0.9.1"
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                }
            ],
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                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "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",
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.7,
                        "baseSeverity": "HIGH"
                    }
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                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
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                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/timescale/pgvectorscale/pull/280",
                    "tags": [
                        "issue-tracking",
                        "patch"
                    ],
                    "name": "Pull Request #280"
                },
                {
                    "url": "https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81",
                    "tags": [
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                },
                {
                    "url": "https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa",
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                {
                    "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/mod.rs#L208-L231",
                    "tags": [
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                    ]
                },
                {
                    "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/pg_vector.rs#L133-L151",
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                    "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253",
                    "tags": [
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                    ]
                },
                {
                    "url": "https://github.com/timescale/pgvectorscale/releases/tag/0.9.1",
                    "tags": [
                        "release-notes"
                    ],
                    "name": "pgvectorscale 0.9.1 Release Notes"
                },
                {
                    "url": "https://github.com/timescale/pgvectorscale",
                    "tags": [
                        "product"
                    ]
                },
                {
                    "name": "VulnCheck Advisory: Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Mehmet Ince",
                    "type": "finder"
                }
            ],
            "x_generator": {
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}