CVE-2026-88829 — Busybox: busybox: http request smuggling via pipelined requests in httpd reverse proxy

CVE-2026-88829

Busybox: busybox: http request smuggling via pipelined requests in httpd reverse proxy PUBLISHED

Description (CNA)

A flaw was found in BusyBox httpd's reverse proxy feature. When the proxy is configured to forward requests matching a URL prefix to a backend server, only the first HTTP request on a TCP connection has its path rewritten. An attacker can send a pipelined second request that is relayed verbatim to the backend, bypassing the configured path restrictions. This allows accessing arbitrary paths on the backend server that were not intended to be exposed through the proxy.

Affected (CNA)

Vendor / product	Versions
Red Hat / Red Hat Hardened Images	affected

CWE

CWE-444

References

https://access.redhat.com/security/cve/CVE-2026-88829
https://bugzilla.redhat.com/show_bug.cgi?id=2531343

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.