CVE-2026-47737

{"id": "CVE-2026-47737", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47737", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-15T14:10:11.985537Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "puma", "product": "puma", "versions": [{"status": "affected", "version": ">= 5.5.0, < 7.2.1"}, {"status": "affected", "version": ">= 8.0.0, < 8.0.2"}]}]}], "published": "2026-07-14T20:17:03.767", "references": [{"url": "https://github.com/puma/puma/commit/439c6136d9c2275721b7864db3ee78af7c80889f", "source": "security-advisories@github.com"}, {"url": "https://github.com/puma/puma/commit/ebe9db3929ab8299d19c8f5b41e8ef4f4b22fa58", "source": "security-advisories@github.com"}, {"url": "https://github.com/puma/puma/pull/3944", "source": "security-advisories@github.com"}, {"url": "https://github.com/puma/puma/pull/3947", "source": "security-advisories@github.com"}, {"url": "https://github.com/puma/puma/releases/tag/v7.2.1", "source": "security-advisories@github.com"}, {"url": "https://github.com/puma/puma/releases/tag/v8.0.2", "source": "security-advisories@github.com"}, {"url": "https://github.com/puma/puma/security/advisories/GHSA-2vqw-3mp8-cgmx", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-290"}, {"lang": "en", "value": "CWE-345"}]}], "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."}], "lastModified": "2026-07-15T18:15:13.373", "sourceIdentifier": "security-advisories@github.com"}