{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-7541","assignerOrgId":"82327ea3-741d-41e4-88f8-2cf9e791e760","state":"PUBLISHED","assignerShortName":"GitHub_P","dateReserved":"2026-04-30T18:42:48.142Z","datePublished":"2026-05-07T21:18:35.655Z","dateUpdated":"2026-05-08T13:44:52.426Z"},"containers":{"cna":{"providerMetadata":{"orgId":"82327ea3-741d-41e4-88f8-2cf9e791e760","shortName":"GitHub_P","dateUpdated":"2026-05-07T21:18:35.655Z"},"title":"Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via unauthenticated API endpoint","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-770","description":"CWE-770 Allocation of resources without limits or throttling","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-229","descriptions":[{"lang":"en","value":"CAPEC-229 Serialized Data Parameter Blowup"}]}],"affected":[{"vendor":"GitHub","product":"Enterprise Server","versions":[{"status":"affected","version":"3.16.0","lessThanOrEqual":"3.16.17","changes":[{"at":"3.16.18","status":"unaffected"}],"versionType":"semver"},{"status":"affected","version":"3.17.0","lessThanOrEqual":"3.17.14","changes":[{"at":"3.17.15","status":"unaffected"}],"versionType":"semver"},{"status":"affected","version":"3.18.0","lessThanOrEqual":"3.18.8","changes":[{"at":"3.18.9","status":"unaffected"}],"versionType":"semver"},{"status":"affected","version":"3.19.0","lessThanOrEqual":"3.19.5","changes":[{"at":"3.19.6","status":"unaffected"}],"versionType":"semver"},{"status":"affected","version":"3.20.0","lessThanOrEqual":"3.20.1","changes":[{"at":"3.20.2","status":"unaffected"}],"versionType":"semver"}],"defaultStatus":"affected"}],"descriptions":[{"lang":"en","value":"A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause service disruption by sending crafted requests with deeply nested JSON payloads to an unauthenticated API endpoint. The endpoint parsed user-controlled JSON request bodies without size or depth limits, causing excessive CPU and memory consumption. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.2, 3.19.6, 3.18.9, 3.17.15, and 3.16.18. This vulnerability was reported via the GitHub Bug Bounty program.","supportingMedia":[{"type":"text/html","base64":false,"value":"A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause service disruption by sending crafted requests with deeply nested JSON payloads to an unauthenticated API endpoint. The endpoint parsed user-controlled JSON request bodies without size or depth limits, causing excessive CPU and memory consumption. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.2, 3.19.6, 3.18.9, 3.17.15, and 3.16.18. This vulnerability was reported via the GitHub Bug Bounty program."}]}],"references":[{"url":"https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.18","tags":["release-notes"]},{"url":"https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.15","tags":["release-notes"]},{"url":"https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.9","tags":["release-notes"]},{"url":"https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.6","tags":["release-notes"]},{"url":"https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.2","tags":["release-notes"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"UNREPORTED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U"}}],"credits":[{"lang":"en","value":"Nguyen Nhat Anh (GitHub: anh2025)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-08T13:44:37.884506Z","id":"CVE-2026-7541","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-08T13:44:52.426Z"}}]}}