How severe is CVE-2011-1498?

No CVSS score has been assigned to CVE-2011-1498 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2011-1498?

CVE-2011-1498 affects the following packages: org.apache.httpcomponents:httpclient (Maven). Ecosystems affected: Maven.

How do I fix CVE-2011-1498?

Update org.apache.httpcomponents:httpclient to 4.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-1498 is resolved across your whole dependency graph.

How do I detect CVE-2011-1498 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.httpcomponents:httpclient, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2011-1498 if there is no patch (or I can't update yet)?

Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Is CVE-2011-1498 actively exploited in the wild?

No public exploit code has been indexed for CVE-2011-1498 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2011-1498?

CVE-2011-1498 has an EPSS (Exploit Prediction Scoring System) score of 6.7%, placing it in the 94th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2011-1498?

CVE-2011-1498 is classified as Information Exposure (CWE-200). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2011-1498 published, and has it been updated?

CVE-2011-1498 was published on July 7, 2011 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕ Maven

Not in CISA KEV

CVE-2011-1498 — httpclient

Fix: apache/httpcomponents-client@a572756

CVE-2011-1498 is a Information Exposure vulnerability in org.apache.httpcomponents:httpclient. A fix is available for org.apache.httpcomponents:httpclient — see the affected versions and patch details below.

Exposure of Sensitive Information to an Unauthorized Actor in Apache HttpClient

Also known asGHSA-gw85-4gmf-m7rh

Published

Jul 7, 2011

Updated

Apr 10, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

6.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs94th percentile — riskier than 94% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

☕org.apache.httpcomponents:httpclient

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.apache.httpcomponents:httpclient`	≥ 4.0.0&&< 4.1.1	4.1.1`org.apache.httpcomponents:httpclient:4.1.1`

Affected Products

1 product · 12 configurations

Application

httpclientapache

3 versions

4.04.0.14.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.httpcomponents:httpclient, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.apache.httpcomponents:httpclient to 4.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-1498 is resolved across your whole dependency graph.
Workarounds
Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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