CVE-2026-51785

{"id": "CVE-2026-51785", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-51785", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-03T17:07:13.041392Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}], "published": "2026-07-31T21:17:31.730", "references": [{"url": "https://fenrisk.com/hiawatha-http-smuggling", "source": "cve@mitre.org"}, {"url": "https://www.rfc-editor.org/rfc/rfc2616", "source": "cve@mitre.org"}, {"url": "https://www.rfc-editor.org/rfc/rfc2616.html#section-4.4", "source": "cve@mitre.org"}, {"url": "https://www.rfc-editor.org/rfc/rfc9112.html#section-6.3", "source": "cve@mitre.org"}, {"url": "https://fenrisk.com/hiawatha-http-smuggling", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-94"}]}], "descriptions": [{"lang": "en", "value": "An issue in Hugo Leisink Hiawatha v.12.1 and before allows a remote attacker to execute arbitrary code via a crafted request"}], "lastModified": "2026-08-31T19:33:11.197", "sourceIdentifier": "cve@mitre.org"}