CVE-2026-27959

Koa (Node.js) prior to versions 3.1.2 and 2.16.4 exposes a vulnerability in ctx.hostname: it naively parses the Host header and returns an attacker-controlled value when the header contains an invalid RFC 3986 hostname (e.g., with a @). This can affect URL generation, password reset links, email ...

CVE-2025-25200

CVE-2025-25200 — Koa (Node.js): A regex-based issue in Koa’s header parsing (X-Forwarded-Proto/Host) before versions 0.21.2, 1.7.1, 2.15.4, and 3.0.0-alpha.3 can be exploited to cause a Denial-of-Service. The fix is included in those versions (and later). The vulnerability stems from an inefficie...

CVE-2025-32379

CVE-2025-32379 (Koa, Node.js): In koa < 2.16.1 and