HTTP request smuggling In nodejs
Description
A flaw in Node.js HTTP client can cause a request desynchronization for Node.js-based forwarding proxies that rebuild outbound headers from the visible IncomingMessage headers while piping the original body to a reused backend connection.
Node.js can omit headers beyond maxHeadersCount / maxHeaderPairs from req.headers, req.rawHeaders, and req.headersDistinct, while still using those omitted headers internally for HTTP message framing. In particular, Content-Length can be hidden from userland while the request body is still delivered.
This vulnerability affects all supported release lines: Node.js 22, Node.js 24, and Node.js 26.
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Component | Affected version | Patched versions |
|---|---|---|---|
 debian 14 | =20.19.2+dfsg-1 || =20.19.4+dfsg-1 || =20.19.5+dfsg+~cs20.19.12-1 || =20.19.5+dfsg+~cs20.19.12-2 || =20.19.5+dfsg+~cs20.19.12-3 || =20.19.5+dfsg+~cs20.19.12-4 || =20.19.5+dfsg+~cs20.19.24-1 || =22.12.0+dfsg-1 || =22.12.0+dfsg-2 || =22.12.0+dfsg-3 || =22.14.0+dfsg-1 || =22.18.0+dfsg+~cs22.17.2-1 || =22.18.0+dfsg+~cs22.17.2-2 || =22.18.0+dfsg-1 || =22.19.0+dfsg+~cs22.18.0-1 || =22.21.1+dfsg+~cs22.19.0-1 || =22.21.1+dfsg+~cs22.19.0-2 || =22.21.1+dfsg+~cs22.19.0-3 || =22.21.1+dfsg+~cs22.19.0-4 || =22.21.1+dfsg+~cs22.19.0-5 || =22.21.1+dfsg+~cs22.19.0-6 || =22.22.0+dfsg+~cs22.19.13-1 || =22.22.0+dfsg+~cs22.19.13-2 || =22.22.0+dfsg+~cs22.19.6-1 || =22.22.1+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || >=0 <24.19.0+dfsg+~cs24.13.3-1 | 24.19.0+dfsg+~cs24.13.3-1 | |
 alpine v3.22 | >=0 <22.23.2-r0 | 22.23.2-r0 | |
alpine v3.21 | >=0 <22.23.2-r0 | 22.23.2-r0 | |
alpine v3.23 | >=0 <24.18.1-r0 | 24.18.1-r0 | |
alpine v3.24 | >=0 <24.18.1-r0 | 24.18.1-r0 | |
debian 12 | =18.13.0+dfsg1-1 || =18.13.0+dfsg1-1.1 || =18.19.0+dfsg-1 || =18.19.0+dfsg-2 || =18.19.0+dfsg-3 || =18.19.0+dfsg-4 || =18.19.0+dfsg-5 || =18.19.0+dfsg-6 || =18.19.0+dfsg-6~deb12u1 || =18.19.0+dfsg-6~deb12u2 || =18.19.1+dfsg-1 || =18.19.1+dfsg-2 || =18.19.1+dfsg-3 || =18.19.1+dfsg-3.1 || =18.19.1+dfsg-4 || =18.19.1+dfsg-6 || =18.20.1+dfsg-1 || =18.20.1+dfsg-2 || =18.20.1+dfsg-3 || =18.20.1+dfsg-4 || =18.20.4+dfsg-1~deb12u1 || =18.20.4+dfsg-1~deb12u2 || =20.10.0+dfsg-1 || =20.12.2+dfsg-1 || =20.13.0+dfsg-1 || =20.13.1+dfsg-1 || =20.13.1+dfsg-2 || =20.14.0+dfsg-1 || =20.14.0+dfsg-2 || =20.14.0+dfsg-3 || =20.15.0+dfsg-1 || =20.15.1+dfsg-1 || =20.16.0+dfsg-1 || =20.17.0+dfsg-1 || =20.17.0+dfsg-2 || =20.18.0+dfsg-1 || =20.18.0+dfsg-2 || =20.18.1+dfsg-1 || =20.18.1+dfsg-2 || =20.18.2+dfsg-1 || =20.18.2+dfsg-2 || =20.18.2+dfsg-3 || =20.18.2+dfsg-4 || =20.18.3+dfsg-1 || =20.19.0+dfsg-1 || =20.19.0+dfsg-2 || =20.19.0+dfsg1-1 || =20.19.2+dfsg-1 || =20.19.4+dfsg-1 || =20.19.5+dfsg+~cs20.19.12-1 || =20.19.5+dfsg+~cs20.19.12-2 || =20.19.5+dfsg+~cs20.19.12-3 || =20.19.5+dfsg+~cs20.19.12-4 || =20.19.5+dfsg+~cs20.19.24-1 || =22.12.0+dfsg-1 || =22.12.0+dfsg-2 || =22.12.0+dfsg-3 || =22.14.0+dfsg-1 || =22.18.0+dfsg+~cs22.17.2-1 || =22.18.0+dfsg+~cs22.17.2-2 || =22.18.0+dfsg-1 || =22.19.0+dfsg+~cs22.18.0-1 || =22.21.1+dfsg+~cs22.19.0-1 || =22.21.1+dfsg+~cs22.19.0-2 || =22.21.1+dfsg+~cs22.19.0-3 || =22.21.1+dfsg+~cs22.19.0-4 || =22.21.1+dfsg+~cs22.19.0-5 || =22.21.1+dfsg+~cs22.19.0-6 || =22.22.0+dfsg+~cs22.19.13-1 || =22.22.0+dfsg+~cs22.19.13-2 || =22.22.0+dfsg+~cs22.19.6-1 || =22.22.1+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || =24.19.0+dfsg+~cs24.13.3-1 | - | |
debian 11 | =12.21.0~dfsg-5 || =12.22.10~dfsg-1 || =12.22.10~dfsg-2 || =12.22.12~dfsg-1~deb11u1 || =12.22.12~dfsg-1~deb11u2 || =12.22.12~dfsg-1~deb11u3 || =12.22.12~dfsg-1~deb11u4 || =12.22.12~dfsg-1~deb11u5 || =12.22.12~dfsg-1~deb11u6 || =12.22.12~dfsg-1~deb11u7 || =12.22.12~dfsg-1~deb11u8 || =12.22.4~dfsg-1 || =12.22.5~dfsg-1 || =12.22.5~dfsg-2 || =12.22.5~dfsg-2~11u1 || =12.22.5~dfsg-3 || =12.22.5~dfsg-4 || =12.22.5~dfsg-5 || =12.22.5~dfsg-6 || =12.22.5~dfsg-7 || =12.22.7~dfsg-1 || =12.22.7~dfsg-2 || =12.22.9~dfsg-1 || =14.11.0~dfsg-1 || =14.11.0~dfsg-2 || =14.12.0~dfsg-1 || =14.13.0~dfsg-1 || =14.16.0~dfsg-1 || =14.16.1~dfsg-1 || =14.17.0~dfsg-1 || =14.17.0~dfsg-2 || =14.4.0~dfsg-1 || =14.4.0~dfsg-2 || =14.7.0~dfsg-1 || =14.8.0~dfsg-1 || =14.9.0~dfsg-1 || =16.11.1~dfsg-1 || =16.13.0~dfsg-1 || =16.13.0~dfsg-2 || =16.13.0~dfsg-3 || =16.13.0~dfsg-4 || =16.13.0~dfsg-5 || =16.13.2+really14.19.0~dfsg-1 || =16.13.2+really14.19.0~dfsg-2 || =16.13.2+really14.19.1~dfsg-1 || =16.13.2+really14.19.1~dfsg-2 || =16.13.2+really14.19.1~dfsg-3 || =16.13.2+really14.19.1~dfsg-4 || =16.13.2+really14.19.1~dfsg-5 || =16.13.2+really14.19.1~dfsg-6 || =16.13.2~dfsg-1 || =16.13.2~dfsg-2 || =16.14.2+dfsg-1 || =16.14.2+dfsg-2 || =16.14.2+dfsg-3 || =16.14.2+dfsg-4 || =16.14.2+dfsg-5 || =16.14.2+dfsg1-1 || =16.15.0+dfsg-1 || =16.15.1+dfsg-1 || =18.10.0+dfsg-1 || =18.10.0+dfsg-2 || =18.10.0+dfsg-3 || =18.10.0+dfsg-4 || =18.10.0+dfsg-5 || =18.10.0+dfsg-6 || =18.11.0+dfsg-1 || =18.11.0+dfsg-2 || =18.11.0+dfsg-3 || =18.11.0+dfsg-4 || =18.12.0+dfsg-1 || =18.12.1+dfsg-1 || =18.12.1+dfsg-2 || =18.12.1+dfsg-2+0.riscv64.1 || =18.13.0+dfsg-1 || =18.13.0+dfsg1-1 || =18.13.0+dfsg1-1.1 || =18.19.0+dfsg-1 || =18.19.0+dfsg-2 || =18.19.0+dfsg-3 || =18.19.0+dfsg-4 || =18.19.0+dfsg-5 || =18.19.0+dfsg-6 || =18.19.0+dfsg-6~deb12u1 || =18.19.0+dfsg-6~deb12u2 || =18.19.1+dfsg-1 || =18.19.1+dfsg-2 || =18.19.1+dfsg-3 || =18.19.1+dfsg-3.1 || =18.19.1+dfsg-4 || =18.19.1+dfsg-6 || =18.20.1+dfsg-1 || =18.20.1+dfsg-2 || =18.20.1+dfsg-3 || =18.20.1+dfsg-4 || =18.20.4+dfsg-1~deb12u1 || =18.20.4+dfsg-1~deb12u2 || =18.3.0+dfsg-1 || =18.4.0+dfsg-1 || =18.4.0+dfsg-2 || =18.6.0+dfsg-1 || =18.6.0+dfsg-2 || =18.6.0+dfsg-3 || =18.6.0+dfsg-4 || =18.6.0+dfsg-5 || =18.7.0+dfsg-1 || =18.7.0+dfsg-4 || =18.7.0+dfsg-5 || =18.8.0+dfsg-1 || =20.10.0+dfsg-1 || =20.12.2+dfsg-1 || =20.13.0+dfsg-1 || =20.13.1+dfsg-1 || =20.13.1+dfsg-2 || =20.14.0+dfsg-1 || =20.14.0+dfsg-2 || =20.14.0+dfsg-3 || =20.15.0+dfsg-1 || =20.15.1+dfsg-1 || =20.16.0+dfsg-1 || =20.17.0+dfsg-1 || =20.17.0+dfsg-2 || =20.18.0+dfsg-1 || =20.18.0+dfsg-2 || =20.18.1+dfsg-1 || =20.18.1+dfsg-2 || =20.18.2+dfsg-1 || =20.18.2+dfsg-2 || =20.18.2+dfsg-3 || =20.18.2+dfsg-4 || =20.18.3+dfsg-1 || =20.19.0+dfsg-1 || =20.19.0+dfsg-2 || =20.19.0+dfsg1-1 || =20.19.2+dfsg-1 || =20.19.4+dfsg-1 || =20.19.5+dfsg+~cs20.19.12-1 || =20.19.5+dfsg+~cs20.19.12-2 || =20.19.5+dfsg+~cs20.19.12-3 || =20.19.5+dfsg+~cs20.19.12-4 || =20.19.5+dfsg+~cs20.19.24-1 || =22.12.0+dfsg-1 || =22.12.0+dfsg-2 || =22.12.0+dfsg-3 || =22.14.0+dfsg-1 || =22.18.0+dfsg+~cs22.17.2-1 || =22.18.0+dfsg+~cs22.17.2-2 || =22.18.0+dfsg-1 || =22.19.0+dfsg+~cs22.18.0-1 || =22.21.1+dfsg+~cs22.19.0-1 || =22.21.1+dfsg+~cs22.19.0-2 || =22.21.1+dfsg+~cs22.19.0-3 || =22.21.1+dfsg+~cs22.19.0-4 || =22.21.1+dfsg+~cs22.19.0-5 || =22.21.1+dfsg+~cs22.19.0-6 || =22.22.0+dfsg+~cs22.19.13-1 || =22.22.0+dfsg+~cs22.19.13-2 || =22.22.0+dfsg+~cs22.19.6-1 || =22.22.1+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || =24.19.0+dfsg+~cs24.13.3-1 | - | |
debian 13 | =20.19.2+dfsg-1 || =20.19.2+dfsg-1+deb13u1 || =20.19.2+dfsg-1+deb13u2 || =20.19.4+dfsg-1 || =20.19.5+dfsg+~cs20.19.12-1 || =20.19.5+dfsg+~cs20.19.12-2 || =20.19.5+dfsg+~cs20.19.12-3 || =20.19.5+dfsg+~cs20.19.12-4 || =20.19.5+dfsg+~cs20.19.24-1 || =22.12.0+dfsg-1 || =22.12.0+dfsg-2 || =22.12.0+dfsg-3 || =22.14.0+dfsg-1 || =22.18.0+dfsg+~cs22.17.2-1 || =22.18.0+dfsg+~cs22.17.2-2 || =22.18.0+dfsg-1 || =22.19.0+dfsg+~cs22.18.0-1 || =22.21.1+dfsg+~cs22.19.0-1 || =22.21.1+dfsg+~cs22.19.0-2 || =22.21.1+dfsg+~cs22.19.0-3 || =22.21.1+dfsg+~cs22.19.0-4 || =22.21.1+dfsg+~cs22.19.0-5 || =22.21.1+dfsg+~cs22.19.0-6 || =22.22.0+dfsg+~cs22.19.13-1 || =22.22.0+dfsg+~cs22.19.13-2 || =22.22.0+dfsg+~cs22.19.6-1 || =22.22.1+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || =24.19.0+dfsg+~cs24.13.3-1 | - | |
 rpm rhel10 | - | - | |
rpm rhel8 | - | - |
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