Advisory severityCritical9.1Apache Software Foundation

Critical [CVE-2026-71290] Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM)

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

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-71290 Source published Aug 11, 2026Source updated Sep 24, 2026

VulniPulse record published Aug 11, 2026Record updated Sep 24, 2026

CVE-2026-71290

Affected products & platforms

Apache Software FoundationUnclassified

Open source advisory

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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 and 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 · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

5.6.4

Official advisory · high-confidence parse· fetched 2 months 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 · high-confidence parse· fetched 2 months 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
Official documentation
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Apache project downloads (fixed releases)
Official documentation
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