VULNERABILITY INTELLIGENCE
CVE-2026-45185
CVSS score9.8 CRITICAL
EPSS probability1.27%
CISA KEVNot currently listed
Published2026-05-12
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- cve@mitre.org: CWE-416
Primary references
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Product
- cve@mitre.org — Broken Link
- cve@mitre.org — Release Notes
- cve@mitre.org — Issue Tracking
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory