{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-47737","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-19T22:16:39.503Z","datePublished":"2026-07-14T19:45:16.648Z","dateUpdated":"2026-07-15T14:10:20.444Z"},"containers":{"cna":{"title":"Puma PROXY Protocol v1 Accepts Repeated Protocol Headers on Persistent Connections","problemTypes":[{"descriptions":[{"cweId":"CWE-290","lang":"en","description":"CWE-290: Authentication Bypass by Spoofing","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx"},{"name":"https://github.com/puma/puma/pull/3944","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/pull/3944"},{"name":"https://github.com/puma/puma/pull/3947","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/pull/3947"},{"name":"https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f"},{"name":"https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58"},{"name":"https://github.com/puma/puma/releases/tag/v7.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/releases/tag/v7.2.1"},{"name":"https://github.com/puma/puma/releases/tag/v8.0.2","tags":["x_refsource_MISC"],"url":"https://github.com/puma/puma/releases/tag/v8.0.2"}],"affected":[{"vendor":"puma","product":"puma","versions":[{"version":">= 5.5.0, < 7.2.1","status":"affected"},{"version":">= 8.0.0, < 8.0.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-14T19:45:16.648Z"},"descriptions":[{"lang":"en","value":"Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, Puma is vulnerable to source IP spoofing when set_remote_address proxy_protocol: :v1 is enabled and persistent connections are used because Puma incorrectly re-parses PROXY protocol headers after each keep-alive request on the same connection, allowing an attacker to inject a second PROXY header and overwrite REMOTE_ADDR. This issue is fixed in versions 7.2.1 and 8.0.2."}],"source":{"advisory":"GHSA-2vqw-3mp8-cgmx","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T14:10:11.985537Z","id":"CVE-2026-47737","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"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":"2026-07-15T14:10:20.444Z"}}]}}