CVE-2026-67402Patch

LOWCVSS 9.2 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

An insecure Apache configuration in ConfigServer Security & Firewall maps /usr/bin as CGI programs through the Messenger v3 HTTPS virtual host. A remote unauthenticated attacker whose address is blocked can request a mapped executable and run arbitrary commands as the Apache user. The vulnerability affects installations where CSF Messenger v3 and its HTTPS mode are enabled. WebPros addressed the vulnerability in version 16.31.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-552

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-03: 1Patch / Workaround · 2026-09-03: 1Technical Details · 2026-09-03: 109-03
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Rıdvan Yağlı@ridvanyagli
    Patch

    🔴 CSF'de kritik güvenlik açığı: CVE-2026-67402 ConfigServer Firewall (CSF) için yayınlanan CVE-2026-67402, MESSENGER servisinde bulunan bir güvenlik açığı nedeniyle yetkisiz kod çalıştırılmasına ve saldırganın root erişimi elde etmesine yol açabiliyor. Açık, CSF'nin MESSENGER/MESSENGERV3 bileşenini etkiliyor. MESSENGER varsayılan olarak devre dışı olsa da özelliği aktif olan sunucuların özellikle kontrol edilmesi gerekiyor. Aşağıdaki sürümler cPanel'in kendi forkuna ait olduğundan, cPanel sahipleri güncelleme yapabilirler. Etkilenen: CSF 16.30-1 ve öncesi Düzeltilen: CSF 16.31+ (bu sürüme güncelleyin) Eğer CSF güncellemeniz mümkün değilse csf.conf dan MESSENGERV3 = 0 yapın. Sonra systemctl restart csf lfd Detaylar: https://support.cpanel.net/hc/en-us/articles/43171958716439-Security-CSF-Security-Release-September-3rd-2026

    Post summary

    The post warns about CVE-2026-67402, a root‑escape flaw in CSF’s MESSENGER component, and recommends updating to version 16.31+ or disabling the feature via configuration to mitigate the vulnerability.

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