Auth bypass in Tencent Weknora
CVE-2026-30857
WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a cross-tenant authorization bypass in the knowledge base copy endpoint allows any authenticated user to clone (duplicate) another tenant’s knowledge base into their own tenant by knowing/guessing the source knowledge base ID. This enables bulk data exfiltration (document/FAQ content) across tenants. This issue has been patched in version 0.3.0.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (14.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.002 · change: -0.001
Affected products
- Tencent Weknora — versions < 0.3.0
Weakness classification (CWE)
References
- github.com/Tencent/WeKnora/security/advisories/GHSA-8rf9-c59g-f82f (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30857?
- CVE-2026-30857 is a medium-severity vulnerability in Tencent Weknora, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-03-07.
- How severe is CVE-2026-30857?
- Medium severity. CVSS v3 base score is 5.3 out of 10.