Vulnerability Report

CVE-2011-1498

Title: Apache Httpclient Information Disclosure

Information Disclosure

Proof Of Concept

No public PoC currently indexed for CVE-2011-1498.

CWE Category CWE-200

Published Date Jul 07, 2011

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 4.3 CVSS v2.0

Exploit Probability (EPSS)

6.68%

Vulnerability Summary

CVE-2011-1498: 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.

Impacted Vendors

apache 1

sensiolabs 1

Reference Links

http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061440.html http://marc.info/?l=httpclient-users&m=129853896315461&w=2 http://marc.info/?l=httpclient-users&m=129856318011586&w=2 http://marc.info/?l=httpclient-users&m=129857589129183&w=2 http://marc.info/?l=httpclient-users&m=129858274406594&w=2 http://marc.info/?l=httpclient-users&m=129858299106950&w=2 http://openwall.com/lists/oss-security/2011/04/07/7 http://openwall.com/lists/oss-security/2011/04/08/1 http://securityreason.com/securityalert/8298 http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.1.x.txt http://www.kb.cert.org/vuls/id/153049 http://www.securityfocus.com/bid/46974 https://bugzilla.redhat.com/show_bug.cgi?id=709531 https://issues.apache.org/jira/browse/HTTPCLIENT-1061 http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061440.html http://marc.info/?l=httpclient-users&m=129853896315461&w=2 http://marc.info/?l=httpclient-users&m=129856318011586&w=2 http://marc.info/?l=httpclient-users&m=129857589129183&w=2 http://marc.info/?l=httpclient-users&m=129858274406594&w=2 http://marc.info/?l=httpclient-users&m=129858299106950&w=2 http://openwall.com/lists/oss-security/2011/04/07/7 http://openwall.com/lists/oss-security/2011/04/08/1 http://securityreason.com/securityalert/8298 http://www.apache.org/dist/httpcomponents/httpclient/RELEASE_NOTES-4.1.x.txt http://www.kb.cert.org/vuls/id/153049 http://www.securityfocus.com/bid/46974 https://bugzilla.redhat.com/show_bug.cgi?id=709531 https://issues.apache.org/jira/browse/HTTPCLIENT-1061

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

4.3

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:M/Au:N/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2011-1498 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 29, 2026 MODIFIED

Vulnerability data updated via NVD.

April 11, 2025 MODIFIED

Vulnerability data or affected products updated.

July 07, 2011 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected Stack

No specific products linked.