EUVD-2026-40010
GHSA-q6r3-vph9-qrqg
Severity by source
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Requires authenticated network access and a vector-indexed table (AC:H/PR:L); impact is limited to stale search result integrity and limited data disclosure with no availability consequence.
Primary rating from Vendor (vuldb).
CVSS VectorVendor: vuldb
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
Lifecycle Timeline
2DescriptionCVE.org
A security flaw has been discovered in MyScale MyScaleDB up to 1.8.0. This vulnerability affects the function SegmentId::getCacheKey in the library src/VectorIndex/Common/SegmentId.h. The manipulation results in insufficient verification of data authenticity. It is possible to launch the attack remotely. A high complexity level is associated with this attack. It is stated that the exploitability is difficult. The exploit has been released to the public and may be used for attacks. The pull request to fix this issue awaits acceptance.
AnalysisAI
Insufficient data authenticity verification in MyScaleDB's vector index cache key function allows authenticated remote users to obtain stale or inconsistent vector search results following mutation operations on indexed columns. Versions through 1.8.0 are affected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid database session with at least low-privilege access (PR:L per the CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 1.3 accurately reflects a low-priority issue for most organizations: AC:H indicates exploitation requires specific database state (a table with a vector index on the mutated column), PR:L confirms an authenticated session is mandatory, and the CIA impacts are all low with no scope change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated database user with low-level privileges identifies a MergeTree table with a vector index defined on a floating-point column. The user issues an ALTER TABLE UPDATE statement modifying values in that indexed column. … |
| Remediation | No vendor-released patched version is available at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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