Critical 9.1Published Aug 11, 2026

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

Updated under an hour ago (2026-10-19 06:25 UTC)

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It affects Apache Software Foundation Apache HttpComponents Client and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache HttpComponents Client

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-295
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Sep 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache HttpComponents Client apache_software_foundation:apache_httpcomponents_client (from the name)	from 5.4-alpha through 5.6.3	CNA record
apache httpclient apache:httpclient	from 5.4 before 5.6.4	NVD

References

https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vqvendor-advisory, mailing-list, release-notes
http://www.openwall.com/lists/oss-security/2026/08/13/6mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.