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NVD description
Mailu is a mail server distributed as a set of Docker images. From Mailu 2.0 until 2024.06.55 and prior to Mailu helm-charts 2.7.3, deployments with PROXY_AUTH_WHITELIST configured but REAL_IP_HEADER unset trusted a client-controlled X-Forwarded-By header for header-based proxy authentication. The proxy_hide_header directive in the nginx template at core/nginx/conf/proxy.conf hid the header from upstream responses but did not overwrite the incoming request value in this configuration. An unauthenticated remote attacker could therefore spoof the trusted proxy identity and bypass authentication. This issue is fixed in Mailu 2024.06.55 and Mailu helm-charts 2.7.3.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
Mailu'da CVE-2026-85751 | CVSS 9.8 Kritik Güvenlik Açığı! Mailu 2.0.0–2024.06.54 sürümlerinde, PROXY_AUTH_WHITELIST yapılandırılmış ancak REAL_IP_HEADER tanımlanmamışsa istemci tarafından spoof edilebilen X-Forwarded-By header'ı üzerinden kimlik doğrulama atlatılabiliyor. 🔴 Uzaktan, kimlik doğrulama gerektirmiyor. ✅ Bu açık, Mailu 2024.06.55 / Helm Charts 2.7.3 ile yamalandı.
#schwachstellen Mailu-Lücke CVE-2026-85751 erlaubt Authentifizierungs-Bypass in Docker-Mailservern #cve202685751 #docker #helm #mailu #nginx https://cybersecurity-news.de/mailu-cve-2026-85751-authentifizierungs-bypass