CVE-2026-45185

{"id": "CVE-2026-45185", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "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}]}, "published": "2026-05-12T20:16:46.137", "references": [{"url": "https://code.exim.org/exim/wiki/wiki/EximSecurity", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://exim.org", "tags": ["Product"], "source": "cve@mitre.org"}, {"url": "https://exim.org/static/doc/security/CVE-2026-45185.txt", "tags": ["Broken Link"], "source": "cve@mitre.org"}, {"url": "https://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://news.ycombinator.com/item?id=48111748", "tags": ["Issue Tracking"], "source": "cve@mitre.org"}, {"url": "https://www.openwall.com/lists/oss-security/2026/05/12/4", "tags": ["Mailing List", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/12/25", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-416"}]}], "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."}], "lastModified": "2026-05-28T18:46:27.410", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B6F6BADD-C865-40D6-BE0A-BC7389F40FFA", "versionEndExcluding": "4.99.3", "versionStartIncluding": "4.97"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}