The tweet mentions bypass techniques discussed in a talk called "Playing Cat and Mouse with WAF: the React2Shell Vercel CTF" from DEVCORE CONFERENCE 2026. Although the tweet does not provide specific payloads or details about the type of vulnerability or the vendor of the Web Application Firewall (WAF), it implies that the talk covers innovative or advanced bypass approaches. This context suggests a focus on the ongoing challenge of evading WAF protections, possibly involving multiple types of vulnerabilities or a specific complex bypass scenario in a capture-the-flag (CTF) style challenge hosted on the Vercel platform.
Since no explicit payload or vendor is mentioned, no direct bypass code can be shared. However, the talk represents an important resource for learning about modern techniques to bypass WAFs, highlighting the need for continuous improvement in WAF rules and security measures to defend against evolving threats.
Check out the original tweet here: https://twitter.com/mlgzackfly114/status/2039410166895128827