{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41487", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-20T16:14:19.007Z", "datePublished": "2026-05-08T14:27:48.588Z", "dateUpdated": "2026-05-08T14:27:48.588Z"}, "containers": {"cna": {"title": "Langfuse: Improper role-based-access control in Langfuse LLM connection management allowed users of role \u201cmember\u201d to retrieve stored LLM provider API keys", "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "lang": "en", "description": "CWE-284: Improper Access Control", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/langfuse/langfuse/security/advisories/GHSA-2524-j966-gfgh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/langfuse/langfuse/security/advisories/GHSA-2524-j966-gfgh"}, {"name": "https://github.com/langfuse/langfuse/pull/13027", "tags": ["x_refsource_MISC"], "url": "https://github.com/langfuse/langfuse/pull/13027"}, {"name": "https://github.com/langfuse/langfuse/pull/13055", "tags": ["x_refsource_MISC"], "url": "https://github.com/langfuse/langfuse/pull/13055"}, {"name": "https://github.com/langfuse/langfuse/commit/7527bb0d84bc0a3dc24a4b16d22ed2e46e6dddff", "tags": ["x_refsource_MISC"], "url": "https://github.com/langfuse/langfuse/commit/7527bb0d84bc0a3dc24a4b16d22ed2e46e6dddff"}, {"name": "https://github.com/langfuse/langfuse/commit/e12386f9d4368bbfff24a4ad7fd53641091605ff", "tags": ["x_refsource_MISC"], "url": "https://github.com/langfuse/langfuse/commit/e12386f9d4368bbfff24a4ad7fd53641091605ff"}, {"name": "https://github.com/langfuse/langfuse/releases/tag/v3.167.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/langfuse/langfuse/releases/tag/v3.167.0"}], "affected": [{"vendor": "langfuse", "product": "langfuse", "versions": [{"version": ">= 3.68.0, < 3.167.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-08T14:27:48.588Z"}, "descriptions": [{"lang": "en", "value": "Langfuse is an open source large language model engineering platform. From version 3.68.0 to before version 3.167.0, there is a role-based-access control flaw in the LLM connection update flow. An authenticated, low-privileged user of role \u201cmember\u201d in a project could request the update of an existing LLM connection to an attacker-controlled baseUrl, causing Langfuse to reuse the stored provider secret and redirect the test request to an attacker-controlled endpoint. This could expose the plaintext provider LLM API key for that connection. The attack is only possible if a user is already part of a project and has \u201cmember\u201d scoped access. This issue has been patched in version 3.167.0."}], "source": {"advisory": "GHSA-2524-j966-gfgh", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Langfuse is an open source large language model engineering platform. From version 3.68.0 to before version 3.167.0, there is a role-based-access control flaw in the LLM connection update flow. An authenticated, low-privileged user of role \u201cmember\u201d in a project could request the update of an existing LLM connection to an attacker-controlled baseUrl, causing Langfuse to reuse the stored provider secret and redirect the test request to an attacker-controlled endpoint. This could expose the plaintext provider LLM API key for that connection. The attack is only possible if a user is already part of a project and has \u201cmember\u201d scoped access. This issue has been patched in version 3.167.0."}], "id": "CVE-2026-41487", "lastModified": "2026-05-08T16:08:15.570", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/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": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-08T15:16:39.800", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/langfuse/langfuse/commit/7527bb0d84bc0a3dc24a4b16d22ed2e46e6dddff"}, {"source": "security-advisories@github.com", "url": "https://github.com/langfuse/langfuse/commit/e12386f9d4368bbfff24a4ad7fd53641091605ff"}, {"source": "security-advisories@github.com", "url": "https://github.com/langfuse/langfuse/pull/13027"}, {"source": "security-advisories@github.com", "url": "https://github.com/langfuse/langfuse/pull/13055"}, {"source": "security-advisories@github.com", "url": "https://github.com/langfuse/langfuse/releases/tag/v3.167.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/langfuse/langfuse/security/advisories/GHSA-2524-j966-gfgh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.68.0,3.167.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "langfuse", "source": "cna", "vendor": "langfuse"}, "product": "langfuse", "vendor": "langfuse"}], "created": "2026-05-08T16:00:13.269690+00:00", "updated": "2026-05-08T16:15:12.462791+00:00", "vendors": ["langfuse", "langfuse$PRODUCT$langfuse"]}