CVE-2026-30859

WeKnora: Broken Access Control - Cross-Tenant Data Exposure

Published Mar 7, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.2.12, a broken access control vulnerability in the database query tool allows any authenticated tenant to read sensitive data belonging to other tenants, including API keys, model configurations, and private messages. The application fails to enforce tenant isolation on critical tables (models, messages, embeddings), enabling unauthorized cross-tenant data access with user-level authentication privileges. This issue has been patched in version 0.2.12.

Analysis

Technical impact

A broken access control flaw in the database query tool of WeKnora permits an authenticated tenant to read sensitive data from other tenants, including API keys, model configurations, and private messages. This violates the isolation principle and is identified as a CWE‑284 type vulnerability, exposing confidentiality of data that should be tenant‑specific.

Affected Systems

Tencent’s WeKnora framework is affected. All deployments running a version prior to 0.2.12 are vulnerable. The issue was fixed in the 0.2.12 release, so any earlier installation carries risk.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity, and the EPSS score of less than 1% suggests a low probability of exploitation. The flaw requires user‑level authentication, so attackers must gain legitimate access as a tenant user. Because the vulnerability is not listed in the CISA KEV catalog, there is no publicly known active exploitation at the time of this analysis.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Tencent

WeKnora

affected

Version	Status	Constraints
`< 0.2.12`	affected	—

Configuration 1 [-]

cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*

No data.

Vendor Product Versions

Tencent

Weknora

Version	Status	Scheme	Platform
`[0,0.2.12)`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update WeKnora to version 0.2.12 or later to patch the tenant isolation flaw.
Re‑configure the database query tool or restrict its permissions so that tenants can only query their own data tables.
Audit user privileges and access logs to ensure no cross‑tenant data is being accessed after the patch.

Generated by OpenCVE AI on April 16, 2026 at 10:46 UTC.

Tracking

Advisories

Source	ID	Title
Github GHSA	GHSA-2f4c-vrjq-rcgv	WeKnora has Broken Access Control - Cross-Tenant Data Exposure

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.242% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/Tencent/WeKnora/security/advisories/GHSA-2f4c-vrjq-rcgv

History

Mar 9, 2026 7:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mar 9, 2026 5:45 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:tencent:weknora::::::::

Mar 9, 2026 10:15 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Tencent Tencent weknora
Vendors & Products		Tencent Tencent weknora

Mar 7, 2026 4:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.2.12, a broken access control vulnerability in the database query tool allows any authenticated tenant to read sensitive data belonging to other tenants, including API keys, model configurations, and private messages. The application fails to enforce tenant isolation on critical tables (models, messages, embeddings), enabling unauthorized cross-tenant data access with user-level authentication privileges. This issue has been patched in version 0.2.12.
Title		WeKnora: Broken Access Control - Cross-Tenant Data Exposure
Weaknesses		CWE-284
References		https://github.com/Tencent/WeKnora/security/advisories/GHSA-2f4c-vrjq-rcgv
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}`