Exim 4.100.1 patches a serious Exim vulnerability set: Proxy Protocol heap flaws, a GnuTLS use-after-free, and SMTP smuggling (CVE-2026-94054). Upgrade now.
PROXY Protocol
Two critical flaws in Apache Traffic Server (CVE-2025-31698, CVE-2025-49763) allow IP-based ACL bypass and remote DoS via ESI plugin.