CVE-2026-5512

{"id": "CVE-2026-5512", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5512", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-22T17:38:49.635439Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "product-cna@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "product-cna@github.com", "affectedData": [{"vendor": "GitHub", "product": "Enterprise Server", "versions": [{"status": "affected", "changes": [{"at": "3.14.26", "status": "unaffected"}], "version": "3.14.0", "versionType": "semver", "lessThanOrEqual": "3.14.25"}, {"status": "affected", "changes": [{"at": "3.15.21", "status": "unaffected"}], "version": "3.15.0", "versionType": "semver", "lessThanOrEqual": "3.15.20"}, {"status": "affected", "changes": [{"at": "3.16.17", "status": "unaffected"}], "version": "3.16.0", "versionType": "semver", "lessThanOrEqual": "3.16.16"}, {"status": "affected", "changes": [{"at": "3.17.14", "status": "unaffected"}], "version": "3.17.0", "versionType": "semver", "lessThanOrEqual": "3.17.13"}, {"status": "affected", "changes": [{"at": "3.18.8", "status": "unaffected"}], "version": "3.18.0", "versionType": "semver", "lessThanOrEqual": "3.18.7"}, {"status": "affected", "changes": [{"at": "3.19.5", "status": "unaffected"}], "version": "3.19.0", "versionType": "semver", "lessThanOrEqual": "3.19.4"}, {"status": "affected", "changes": [{"at": "3.20.1", "status": "unaffected"}], "version": "3.20.0", "lessThan": "3.20.1", "versionType": "semver"}], "defaultStatus": "affected"}]}], "published": "2026-04-21T23:16:22.297", "references": [{"url": "https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.26", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.21", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.17", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.14", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.8", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.5", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.1", "tags": ["Release Notes", "Vendor Advisory"], "source": "product-cna@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "product-cna@github.com", "description": [{"lang": "en", "value": "CWE-201"}]}], "descriptions": [{"lang": "en", "value": "An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to determine the names of private repositories by their numeric ID. The mobile upload policy API endpoint did not perform an early authorization check, and validation error messages included the full repository name for repositories the caller did not have access to. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program."}, {"lang": "es", "value": "Una vulnerabilidad de autorizaci\u00f3n impropia fue identificada en GitHub Enterprise Server que permit\u00eda a un atacante autenticado determinar los nombres de repositorios privados por su ID num\u00e9rico. El endpoint de la API de pol\u00edtica de carga m\u00f3vil no realizaba una verificaci\u00f3n de autorizaci\u00f3n temprana, y los mensajes de error de validaci\u00f3n inclu\u00edan el nombre completo del repositorio para repositorios a los que el llamador no ten\u00eda acceso. Esta vulnerabilidad afect\u00f3 a todas las versiones de GitHub Enterprise Server anteriores a la 3.21 y fue corregida en las versiones 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21 y 3.14.26. Esta vulnerabilidad fue reportada a trav\u00e9s del programa GitHub Bug Bounty."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "72A92258-9FCC-41E0-856B-3C2A495575A6", "versionEndExcluding": "3.14.26"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3A14A459-881C-437A-88EC-D721E3005329", "versionEndExcluding": "3.15.21", "versionStartIncluding": "3.15.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8B7DCD9A-2CF0-4D96-AA96-ACEC662A8E1F", "versionEndExcluding": "3.16.17", "versionStartIncluding": "3.16.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CEC2ADE6-3E31-4889-9A73-B6695FE0AB52", "versionEndExcluding": "3.17.14", "versionStartIncluding": "3.17.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B15B12E-00A8-48E8-81DE-54506B94A2C5", "versionEndExcluding": "3.18.8", "versionStartIncluding": "3.18.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "56903EAF-4579-4263-AB0F-863323E7C81A", "versionEndExcluding": "3.19.5", "versionStartIncluding": "3.19.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:3.20.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DCA4F97D-688E-45D2-90C0-8A11E9B531AA"}], "operator": "OR"}]}], "sourceIdentifier": "product-cna@github.com"}