UnratedApache Software Foundation Updated

Unknown [CVE-2026-71290] Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer

This security Apache Software Foundation advisory covers CVE-2026-71290 affecting Apache HttpComponents Client.

CVE-2026-71290 Published Aug 11, 2026Updated by vendor Aug 11, 2026

CVE-2026-71290

Affected products & platforms

Apache Software FoundationUnclassified

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Summary

Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer. HostnameVerificationPolicy#BUILTIN setting has no effect when used with the async version of HttpClient.

An attacker that can intercept and modify traffic between the client the server can impersonate the server by presenting a valid certificate

for a different domain.

Please note the classic version of HttpClient is not affected by this vulnerability.

Affected users are recommended to upgrade to at least version 5.6.4, which fixes the issue.

Affected versions

Apache HttpComponents Client 5.4-alpha through 5.6.3

Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source

Fixed versions

5.6.4

Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Affected users are recommended to upgrade to at least version 5.6.4, which fixes the issue.

Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-71290 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-71290NVD CVE.org MITRE

Official resources

ASF Security — reporting & CVE process
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