CVE-2026-30856

{"id": "CVE-2026-30856", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 1.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 2.8}]}, "published": "2026-03-07T17:15:53.210", "references": [{"url": "https://github.com/Tencent/WeKnora/security/advisories/GHSA-67q9-58vj-32qx", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-706"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "WeKnora es un framework impulsado por LLM dise\u00f1ado para la comprensi\u00f3n profunda de documentos y la recuperaci\u00f3n sem\u00e1ntica. Antes de la versi\u00f3n 0.3.0, una vulnerabilidad que implica colisi\u00f3n de nombres de herramientas e inyecci\u00f3n indirecta de prompts permite a un servidor MCP remoto malicioso secuestrar la ejecuci\u00f3n de herramientas. Al explotar una convenci\u00f3n de nombres ambigua en el cliente MCP (mcp_{service}_{tool}), un atacante puede registrar una herramienta maliciosa que sobrescribe una leg\u00edtima (por ejemplo, tavily_extract). Esto permite al atacante redirigir el flujo de ejecuci\u00f3n del LLM, exfiltrar prompts del sistema, contexto y potencialmente ejecutar otras herramientas con los privilegios del usuario. Este problema ha sido parcheado en la versi\u00f3n 0.3.0."}], "lastModified": "2026-04-13T14:43:36.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:tencent:weknora:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F3180E7-F262-4100-96C2-4AB5730E75FF", "versionEndExcluding": "0.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}