http-proxy-middleware Host Header Router Bypass PoC

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Security AdvisoryHighchimurai

Affected:

http-proxy-middleware >= 0.16.0 < 2.0.10
http-proxy-middleware >= 3.0.0 < 3.0.6
http-proxy-middleware >= 4.0.0 < 4.1.0

Fixed in:

2.0.10
3.0.6
4.1.0

Referenced CVEs: CVE-2026-55602

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