CVE-2011-1498

CVE-2011-1498 is a medium-severity vulnerability in Apache Httpclient with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

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.

Frequently asked questions

What is 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.
How severe is CVE-2011-1498?
CVE-2011-1498 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-1498 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1498?
CVE-2011-1498 primarily affects Apache Httpclient. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1498?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1498 published?
CVE-2011-1498 was published on 2011-07-07 and last updated on 2026-06-16.

References

Affected products (12)

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