{"id":"CVE-2026-30856","summary":"WeKnora: Tool Execution Hijacking via Ambigous Naming Convention In MCP client and Indirect Prompt Injection","details":"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.","aliases":["GHSA-67q9-58vj-32qx","GO-2026-4638"],"modified":"2026-04-10T05:41:55.461083Z","published":"2026-03-07T16:32:44.566Z","related":["SUSE-SU-2026:1042-1"],"database_specific":{"cwe_ids":["CWE-706"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30856.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30856.json"},{"type":"ADVISORY","url":"https://github.com/Tencent/WeKnora/security/advisories/GHSA-67q9-58vj-32qx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30856"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tencent/weknora","events":[{"introduced":"0"},{"fixed":"2979f9764af4a6ae4e226be084a4fa91ed5c8249"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"0.3.0"}]}}],"versions":["v0.1.0","v0.1.1","v0.1.2","v0.1.3","v0.1.5","v0.1.6","v0.2.0","v0.2.1","v0.2.10","v0.2.11","v0.2.12","v0.2.13","v0.2.14","v0.2.2","v0.2.3","v0.2.4","v0.2.5","v0.2.6","v0.2.7","v0.2.8","v0.2.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30856.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:L"}]}