{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33729", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-23T17:34:57.560Z", "datePublished": "2026-03-27T00:27:40.726Z", "dateUpdated": "2026-03-27T00:27:40.726Z"}, "containers": {"cna": {"title": "OpenFGA has an Authorization Bypass through cached keys", "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "lang": "en", "description": "CWE-20: Improper Input Validation", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-345", "lang": "en", "description": "CWE-345: Insufficient Verification of Data Authenticity", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1289", "lang": "en", "description": "CWE-1289: Improper Validation of Unsafe Equivalence in Input", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "baseScore": 5.8, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H", "version": "4.0"}}], "references": [{"name": "https://github.com/openfga/openfga/security/advisories/GHSA-h6c8-cww8-35hf", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/openfga/openfga/security/advisories/GHSA-h6c8-cww8-35hf"}, {"name": "https://github.com/openfga/openfga/commit/049b50ccd2cc7e163bd897f3d17a7b859ad146f8", "tags": ["x_refsource_MISC"], "url": "https://github.com/openfga/openfga/commit/049b50ccd2cc7e163bd897f3d17a7b859ad146f8"}, {"name": "https://github.com/openfga/openfga/releases/tag/v1.13.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/openfga/openfga/releases/tag/v1.13.1"}], "affected": [{"vendor": "openfga", "product": "openfga", "versions": [{"version": "< 1.13.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-27T00:27:40.726Z"}, "descriptions": [{"lang": "en", "value": "OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. In versions prior to 1.13.1, under specific conditions, models using conditions with caching enabled can result in two different check requests producing the same cache key. This can result in OpenFGA reusing an earlier cached result for a different request. Users are affected if the model has relations which rely on condition evaluation andncaching is enabled. OpenFGA v1.13.1 contains a patch."}], "source": {"advisory": "GHSA-h6c8-cww8-35hf", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "OpenFGA is a high-performance and flexible authorization/permission engine built for developers and inspired by Google Zanzibar. In versions prior to 1.13.1, under specific conditions, models using conditions with caching enabled can result in two different check requests producing the same cache key. This can result in OpenFGA reusing an earlier cached result for a different request. Users are affected if the model has relations which rely on condition evaluation andncaching is enabled. OpenFGA v1.13.1 contains a patch."}], "id": "CVE-2026-33729", "lastModified": "2026-03-27T01:16:20.367", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-27T01:16:20.367", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/openfga/openfga/commit/049b50ccd2cc7e163bd897f3d17a7b859ad146f8"}, {"source": "security-advisories@github.com", "url": "https://github.com/openfga/openfga/releases/tag/v1.13.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/openfga/openfga/security/advisories/GHSA-h6c8-cww8-35hf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-345"}, {"lang": "en", "value": "CWE-1289"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.13.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "openfga", "source": "cna", "vendor": "openfga"}, "product": "openfga", "vendor": "openfga"}], "analysis": {"en": {"generated_at": "2026-03-27T06:24:00.814337+00:00", "value": {"mitigation_remediation": ["Apply the vendor patch by upgrading to OpenFGA v1.13.1 or later.", "If immediate upgrade is not possible, disable caching for models that use condition-based relations in the OpenFGA configuration.", "After disabling caching, monitor access logs for anomalous authorization patterns to ensure the issue is resolved."], "summary": {"action": "Apply Patch", "impact": "Authorization Bypass"}, "threat_synthesis": {"affected_systems": "The vulnerability affects all instances of openfga:openfga running versions prior to 1.13.1. Users of the OpenFGA engine that have models with condition-based relations and caching enabled are impacted. Versions 1.13.1 and later contain the remediation patch.", "description_and_impact": "OpenFGA, a permission engine, contains a flaw where models that use conditions with caching enabled can produce identical cache keys for two distinct authorization check requests. When this occurs, the engine may return the cached result from the first request for the second, unintended request, allowing a user to be authorized for resources they should not have access to. This represents an authorization bypass that compromises confidentiality and integrity of protected data, but does not directly enable remote code execution or denial of service.", "risk_and_exploitability": "The CVSS score of 5.8 indicates a medium severity vulnerability. EPSS data is not available, so the current exploitation likelihood cannot be quantified, and the issue is not listed in CISA's KEV catalog. The most likely attack vector is through normal API calls to the authorization service \u2013 an attacker could craft two check requests that meet the caching key collision criteria and obtain unauthorized access. Because the flaw manifests only when caching is enabled for condition-based models, environments that have already disabled caching for such models are less exposed."}}}}, "created": "2026-03-27T08:31:10.577280+00:00", "updated": "2026-03-27T09:22:32.969472+00:00", "vendors": ["openfga", "openfga$PRODUCT$openfga"]}