{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-66065", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-23T23:25:28.897Z", "datePublished": "2026-08-03T20:20:27.599Z", "dateUpdated": "2026-08-03T20:20:27.599Z"}, "containers": {"cna": {"title": "Ouroboros: Untrusted project .env can still reach RCE via omitted execution-routing keys (Incomplete fix of CVE-2026-47211)", "problemTypes": [{"descriptions": [{"cweId": "CWE-15", "lang": "en", "description": "CWE-15: External Control of System or Configuration Setting", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-94", "lang": "en", "description": "CWE-94: Improper Control of Generation of Code ('Code Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 8.4, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/Q00/ouroboros/security/advisories/GHSA-jv2h-4p9v-wf5w", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Q00/ouroboros/security/advisories/GHSA-jv2h-4p9v-wf5w"}, {"name": "https://github.com/Q00/ouroboros/releases/tag/v0.42.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/Q00/ouroboros/releases/tag/v0.42.1"}], "affected": [{"vendor": "Q00", "product": "ouroboros", "versions": [{"version": "< 0.42.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-03T20:20:27.599Z"}, "descriptions": [{"lang": "en", "value": "Ouroboros is a local-first runtime for AI coding agents that records their actions and applies user-defined policies to constrain behavior. Versions prior to 0.42.1 have an incomplete denylist. Several execution-routing keys of the same RCE class were omitted, so a malicious cloned repo can still reach arbitrary command execution by shipping a .env (auto-loaded at import, with no review step). The CVE-2026-47211 fix added _UNTRUSTED_ENV_DENYLIST to stop an untrusted project-directory .env from redirecting execution, but it did not account for all keys. The backend config-home and MCP/plugin roots bypass the approval gate by pointing the nested agent, MCP servers, and plugin roster at attacker config. Other variables re-enable blocked local transports, replace sub-agent prompts, switch backends, and lower tool approval classes, further weakening the approval gate. This issue has been fixed in version 0.42.1."}], "source": {"advisory": "GHSA-jv2h-4p9v-wf5w", "discovery": "UNKNOWN"}}}}

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