CVE-2026-77521

{"id": "CVE-2026-77521", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-77521", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-09-22T13:31:58.194506Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 10.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "1Panel-dev", "product": "MaxKB", "versions": [{"status": "affected", "version": "< 2.10.5-lts"}]}]}], "published": "2026-09-21T21:17:10.943", "references": [{"url": "https://github.com/1Panel-dev/MaxKB/commit/594f50f2ea80a502d1c955371ba0438b277c30ea", "source": "security-advisories@github.com"}, {"url": "https://github.com/1Panel-dev/MaxKB/releases/tag/v2.10.5-lts", "source": "security-advisories@github.com"}, {"url": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f36j-f34j-h3rx", "source": "security-advisories@github.com"}, {"url": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-f36j-f34j-h3rx", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-250"}, {"lang": "en", "value": "CWE-749"}]}], "descriptions": [{"lang": "en", "value": "MaxKB is an open-source AI assistant for enterprise. Prior to version 2.10.5-lts, assistants with a tool, MCP tool, skill, or sub-application use SandboxShellBackend, which exposes an execute shell tool without excluding it and omits execute from interrupt_on, so human approval is not required. Untrusted chat or ingested content can therefore cause command execution; source deployments with MAXKB_SANDBOX disabled run commands directly as the application user, while the official root container's string-based gosu wrapper allowed shell metacharacters to execute outside the intended sandbox. This issue is fixed in version 2.10.5-lts."}], "lastModified": "2026-09-22T14:17:15.343", "sourceIdentifier": "security-advisories@github.com"}