{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Exim", "vendor": "Exim", "versions": [{"lessThan": "4.99.3", "status": "affected", "version": "4.97", "versionType": "custom"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "matchCriteriaId": "B6F6BADD-C865-40D6-BE0A-BC7389F40FFA", "versionEndExcluding": "4.99.3", "versionStartIncluding": "4.97", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to heap corruption. An unauthenticated network attacker exploiting this vulnerability could execute arbitrary code."}, {"lang": "es", "value": "Exim anterior a 4.99.3, en ciertas configuraciones de GnuTLS, tiene un uso despu\u00e9s de liberaci\u00f3n alcanzable remotamente en la ruta de an\u00e1lisis del cuerpo BDAT. Se activa cuando un cliente env\u00eda un TLS close_notify a mitad del cuerpo durante una transferencia CHUNKING, seguido de un byte de texto claro final en la misma conexi\u00f3n TCP. Esto puede llevar a la corrupci\u00f3n de la pila. Un atacante de red no autenticado que explote esta vulnerabilidad podr\u00eda ejecutar c\u00f3digo arbitrario."}], "id": "CVE-2026-45185", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "cve@mitre.org", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45185", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-13T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-05-12T20:16:46.137", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://code.exim.org/exim/wiki/wiki/EximSecurity"}, {"source": "cve@mitre.org", "tags": ["Product"], "url": "https://exim.org"}, {"source": "cve@mitre.org", "tags": ["Broken Link"], "url": "https://exim.org/static/doc/security/CVE-2026-45185.txt"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking"], "url": "https://news.ycombinator.com/item?id=48111748"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2026/05/12/4"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/05/12/25"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "cve@mitre.org", "type": "Secondary"}]}