Cloudflare patches WAF bypass vulnerability allowing direct server access

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January 21, 2026 at 3:36 PM

Overview

Cloudflare has patched a vulnerability in its Web Application Firewall (WAF) that could allow attackers to bypass security measures and gain direct access to servers. This vulnerability was identified by researchers from FearsOff in October and reported through Cloudflare's bug bounty program. Companies using Cloudflare’s WAF should be aware that this issue posed a risk of unauthorized access to their systems. The patch has been released to mitigate this risk, and it’s crucial for users to apply the updates promptly to ensure their applications remain secure. Staying ahead of such vulnerabilities is essential for maintaining the integrity of web applications.

Key Takeaways

Affected Systems: Cloudflare Web Application Firewall
Action Required: Cloudflare has released a patch to address this vulnerability.
Timeline: Disclosed in October 2023

Original Article Summary

The vulnerability was discovered by FearsOff security researchers in October and reported through Cloudflare's bug bounty program.

Impact

Cloudflare Web Application Firewall

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed in October 2023

Remediation

Cloudflare has released a patch to address this vulnerability. Users should apply the latest updates to their WAF.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability, Patch.

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