News

ACME flaw in Cloudflare allowed attackers to reach origin servers

  • Pierluigi Paganini--Securityaffairs.com
  • published date: 2026-01-21 15:10:10 UTC

Cloudflare fixed a flaw in its ACME validation logic that could let attackers bypass security checks and access protected origin servers. Cloudflare fixed a flaw in its ACME HTTP-01 validation logic that could let attackers bypass security checks and reach or…

ACME Flaw in Cloudflare allowed attackers to reach origin servers Cloudflare fixed a flaw in its ACME HTTP-01 validation logic that could let attackers bypass security checks and reach origin server… [+2725 chars]