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Host Header Injection Bypasses Access Control (CVE-2026-33314)

YouTubePentesterLab

Host Header Injection Bypasses Access Control (CVE-2026-33314)

pyload-ng's local-only check used an OR condition: if the IP is localhost OR the Host header is localhost, allow access. Since the Host header is attacker-controlled, anyone could bypass the restriction with a single curl flag. The fix: require BOTH to match. #appsec #codereview #webhacking

32 views4 months ago

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