CCloud Releases
Home
Following

Cloud Releases

Service catalogues and updates come from each provider's public product listing and announcements.

Explore

  • Home
  • Latest updates
  • Following

About

  • About
  • Contact
  • Privacy Policy
  • Terms of Use

Providers

  • Amazon Web Services
  • Microsoft Azure
  • Google Cloud
  • Cloudflare

Not affiliated with any cloud provider. Product names and logos belong to their owners.

  1. Providers
  2. ›Cloudflare
  3. ›WAF
  4. ›Update

Feature•Oct 1, 2026

WAF Release - 2026-10-01 - Emergency

WAFCloudflare · Application security

This update provides immediate defense against a vulnerability affecting Citrix NetScaler ADC and Gateway appliances, deploying protection against improper input validation vectors.

Key Findings

  • CVE-2026-88771: An improper input validation vulnerability affecting Citrix NetScaler ADC and Gateway allows an unauthenticated attacker to execute arbitrary commands.

Impact

We strongly recommend that administrators apply the latest versions to fully secure origin servers. Additionally, customers should review configurations against applicable preconditions and follow standard incident response processes if signs of compromise are identified.

Detailed Rule Changes

Ruleset · Rule ID · Legacy Rule ID · Description · Previous Action · New Action · Comments

Cloudflare Managed Ruleset · 6802845374ea41a289fd4f43827ab216 · N/A · Citrix Netscaler ADC and Gateway - Improper input validation - CVE:CVE-2026-88771 · N/A · Block · This is a new detection.

Read the original announcement↗

More from WAF

All WAF updates →

  1. WAF Release - 2026-10-12

    This release introduces new detections to mitigate recent vulnerabilities affecting TanStack and Atlassian products.

    WAF•Feature•Oct 12, 2026

  2. WAF Release - Scheduled changes for 2026-10-19

    Announcement Date Release Date Release Behavior Legacy Rule ID Rule ID Description Comments 2026-10-12 2026-10-19 Log N/A d60e605ed36842df9ca0232f5ea9966d Broken Access Control - Directory Traversal (Beta) This rule will be merged into the original rule "Broken Access Control -…

    WAF•Feature•Oct 12, 2026

  3. Failed detections field available in Rules

    You can now use cf.appsec.request.failed_detections to control how your rules handle requests when a security detection reports a failure.

    WAF•Feature•Oct 9, 2026

  4. Updated unsafe topic detection for AI Security for Apps

    AI Security for Apps now supports an updated set of categories for detecting unsafe topics in incoming prompts.

    WAF•Feature•Oct 7, 2026

  5. WAF Release - 2026-10-06

    This release introduces a new detection to mitigate a heap-based buffer overflow vulnerability in F5 BIG-IP, and enhances existing command injection protections by incorporating tested beta logic into the baseline rule.

    WAF•Feature•Oct 6, 2026