CVE-2011-1498 Exposure of Sensitive Information to an Unauthorized Actor in Apache HttpClient

What is CVE-2011-1498?

CVE-2011-1498 is a medium-severity vulnerability in n/a, published on 7 Jul 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Apache HttpClient 4.x before 4.1.1 in Apache HttpComponents, when used with an authenticating proxy server, sends the Proxy-Authorization header to the origin server, which allows remote web servers to obtain sensitive information by logging this header.

Weakness: CWE-200

Which versions are affected by CVE-2011-1498?

2 open source packages ship an affected version, including org.apache.httpcomponents:httpclient. It affects 1 product.

Products include Apache Httpclient.

How do I fix CVE-2011-1498?

Upgrade org.apache.httpcomponents:httpclient to 4.1.1 or later.

Is CVE-2011-1498 being exploited?

There is no known exploitation of CVE-2011-1498 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2013-4366 Hostname verification in Apache HttpClient 4.3 was disabled by default Critical 9.8
• CVE-2026-71290 Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM) Critical 9.1
• CVE-2025-27820 Apache HttpComponents: PSL (Public Suffix List) validation bypass High 7.5
• CVE-2026-40542 Apache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification High 7.3
• CVE-2012-5783 Improper Certificate Validation in Apache Commons HttpClient Medium 5.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2011-1498, GHSA-gw85-4gmf-m7rh.