Vulnerability in Red Hat Hardened Images

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund14 Oct 2026WID-SEC-2026-3953

  BusyBox: Multiple vulnerabilities Translated from German

  CVE-2026-90954CVE-2026-88829CVE-2026-88842

[ References ]References

• access.redhat.com/security/cve/CVE-2026-88829
• bugzilla.redhat.com/show_bug.cgi