Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes
Summary
| CVE | CVE-2026-116489 |
|---|---|
| State | PUBLISHED |
| Assigner | VulnCheck |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-26 16:17:18 UTC |
| Updated | 2026-10-26 18:39:42 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 7.7 HIGH from [email protected]
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
Problem Types: CWE-843 | CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 7.7 | HIGH | 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/C... |
| 4.0 | CNA | CVSS | 7.7 | HIGH | 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 |
| 3.1 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
HighAttack Requirements
PresentPrivileges Required
LowUser Interaction
NoneConfidentiality
HighIntegrity
HighAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS: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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Timescale | Pgvectorscale | affected 0.9.1 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f6... | [email protected] | github.com | |
| github.com/timescale/pgvectorscale | [email protected] | github.com | |
| github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d2... | [email protected] | github.com | |
| github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_m... | [email protected] | github.com | |
| github.com/timescale/pgvectorscale/releases/tag/0.9.1 | [email protected] | github.com | |
| www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusio... | [email protected] | www.vulncheck.com | |
| github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_m... | [email protected] | github.com | |
| github.com/timescale/pgvectorscale/pull/280 | [email protected] | github.com | |
| github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3... | [email protected] | github.com | |
| github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_m... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Mehmet Ince (en)
There are currently no legacy QID mappings associated with this CVE.