WAF - WAF Release - 2026-10-14 - Emergency

<p>This emergency release adds a new managed rule to block active exploitation of a critical remote code execution (RCE) vulnerability found in popular web frameworks.</p> <p><strong>Key Findings</strong></p> <p>Key Findings</p> <ul> <li>Generic Rules - Remote Code Execution: Attackers can execute arbitrary system commands with web server privileges by sending malicious input containing invalid path sequences during request processing.</li> </ul> <table style="width: 100%"><thead><tr><th>Ruleset</th><th>Rule ID</th><th>Legacy Rule ID</th><th>Description</th><th>Previous Action</th><th>New Action</th><th>Comments</th></tr></thead><tbody><tr><td>Cloudflare Managed Ruleset</td><td><span class="rule-id" data-rule-id="44131076d2fa41fb97c61ec2fd1bf420"><button type="button" title="Copy rule ID" aria-label="Copy rule ID 44131076d2fa41fb97c61ec2fd1bf420" class="border-border bg-muted hover:border-foreground/30 hover:bg-accent inline-flex cursor-copy items-center rounded-md border px-1.5 py-0.5 transition-colors duration-150"><span class="font-mono text-[0.8125rem] font-medium">...fd1bf420</span></button></span></td><td>N/A</td><td>Generic Rules - Remote Code Execution</td><td>N/A</td><td>Block</td><td>This is a new detection.</td></tr></tbody></table>