CVE-2026-88829High· 7.2▾ TwilightA 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 ca…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.6 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-90678High· 7.5An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5
CVE-2026-88842Low· 3.3A flaw was found in BusyBox dpkg
CVE-2026-90954High· 7.8A flaw was found in BusyBox's dpkg-deb archive extraction
CVE-2026-84838High· 7.8A flaw was found in rpmuncompress
CVE-2026-84837High· 7.8A flaw was found in rpm
CVE-2026-78367High· 7.0A vulnerability was found in RPM's rpmbuild tarball processing