Slacker Slash: Bypassing Bun Security Middleware via Normalization Desync
Summary
How WHATWG URL compliance in Bun creates a normalization desync with POSIX utilities, enabling double-slash and partial-path middleware bypasses.
- Published
- Collected
--- id: 9124 title: "Slacker Slash: Bypassing Bun Security Middleware via Normalization Desync" source_domain: lab.ctbb.show source_url: "https://lab.ctbb.show/research/bun-slacker-slash" published_at: "2026-03-13T00:00:00Z" tags: ["bun", "auth-bypass", "ctbb", "normalization", "middleware"] phying_url: "https://phying.com/item/9124" lang: en --- # Slacker Slash: Bypassing Bun Security Middleware via Normalization Desync ## Summary How WHATWG URL compliance in Bun creates a normalization desync with POSIX utilities, enabling double-slash and partial-path middleware bypasses. ## Intelligence Metadata - **Sources:** lab.ctbb.show - **Published:** 2026-03-13T00:00:00Z - **Original:** https://lab.ctbb.show/research/bun-slacker-slash - **Phying News:** https://phying.com/item/9124