{"id":"CVE-2026-45185","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-45185","generatedAt":"2026-10-28T07:04:45.300Z","title":"Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path.","description":"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.","published":"2026-05-12T20:16:46.000Z","lastModified":"2026-06-17T10:51:45.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["exim/exim"],"epss":{"score":0.0127,"percentile":0.69655,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"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"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45185","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}