Vulnerability Description
WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a vulnerability involving tool name collision and indirect prompt injection allows a malicious remote MCP server to hijack tool execution. By exploiting an ambiguous naming convention in the MCP client (mcp_{service}_{tool}), an attacker can register a malicious tool that overwrites a legitimate one (e.g., tavily_extract). This enables the attacker to redirect LLM execution flow, exfiltrate system prompts, context, and potentially execute other tools with the user's privileges. This issue has been patched in version 0.3.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tencent | Weknora | < 0.3.0 |
Related Weaknesses (CWE)
References
- https://github.com/Tencent/WeKnora/security/advisories/GHSA-67q9-58vj-32qxExploitVendor Advisory
FAQ
What is CVE-2026-30856?
CVE-2026-30856 is a vulnerability with a CVSS score of 5.9 (MEDIUM). WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a vulnerability involving tool name collision and indirect prompt injectio...
How severe is CVE-2026-30856?
CVE-2026-30856 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30856?
Check the references section above for vendor advisories and patch information. Affected products include: Tencent Weknora.