Description
The Apache HTTP server before 1.3.34, and 2.0.x before 2.0.55, when acting as an HTTP proxy, allows remote attackers to poison the web cache, bypass web application firewall protection, and conduct XSS attacks via an HTTP request with both a "Transfer-Encoding: chunked" header and a Content-Length header, which causes Apache to incorrectly handle and forward the body of the request in a way that causes the receiving server to process it as a separate HTTP request, aka "HTTP Request Smuggling."
References (59)
Scores
EPSS
0.5429
EPSS Percentile
98.0%
Details
CWE
CWE-444
Status
published
Products (3)
apache/http_server
2.0.35 - 2.0.55
debian/debian_linux
3.0
debian/debian_linux
3.1
Published
Jul 05, 2005
Tracked Since
Feb 18, 2026