CVE-2026-30859Public exploitNetwork attack vector

Cross-tenant data disclosure via incomplete query filtering

Published Mar 7, 2026 · Updated Mar 7, 2026

Improper access control in Tencent WeKnora before 0.2.12 allows remote authenticated users to read other tenants' sensitive data. In internal/utils/inject.go, WithSecurityDefaults permits queries to the messages, embeddings, and models tables, while WithTenantIsolation omits them and therefore adds no tenant_id filter. Any user-level tenant account that can invoke database_query through an AI prompt can retrieve cross-tenant API keys, model settings, and private messages.

CVSS severity5.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Tencent WeKnora before 0.2.12 allows remote authenticated users to read other tenants' sensitive data. In internal/utils/inject.go, WithSecurityDefaults permits queries to the messages, embeddings, and models tables, while WithTenantIsolation omits them and therefore adds no tenant_id filter. Any user-level tenant account that can invoke database_query through an AI prompt can retrieve cross-tenant API keys, model settings, and private messages.

The record

CVE
CVE-2026-30859
Published
Mar 7, 2026
Updated
Mar 7, 2026
Vendor
Tencent
Product
WeKnora
Classifications
CWE-284, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.2.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tencent · WeKnoraversion=< 0.2.12

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1213Data from Information Repositories

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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