CVE catalog

CVE-2026-71290

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.

[CVE catalog]

Severity: Critical · CVSS 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: Aug 11, 2026, 8:33:56 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.33% · Oct 27, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	httpcomponents-core5	sid	`5.4.4-1`	vulnerable
Debian	httpcomponents-core5	forky	`5.4.4-1`	vulnerable
Debian	httpcomponents-core5	trixie	`5.2.2-1`	not affected
Debian	httpcomponents-core5	bookworm	`5.2.1-1`	not affected
Debian	httpcomponents-client	sid	`4.5.14-1`	not affected
Debian	httpcomponents-client	forky	`4.5.14-1`	not affected
Debian	httpcomponents-client	trixie	`4.5.14-1`	not affected
Debian	httpcomponents-client	bookworm	`4.5.14-1`	not affected
Cpe	httpclient	Not reported	`5.6.4`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	httpcomponents-core5	source	sid	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	httpcomponents-core5	source	forky	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	httpcomponents-core5	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	httpcomponents-core5	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Debian	httpcomponents-client	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	httpcomponents-client	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	httpcomponents-client	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	httpcomponents-client	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Cpe	httpclient	cpe	Not reported	`5.6.4`	Not reported	NVD-CVE-2026-71290	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libhttpclient-java]Not affected
Source package: [httpcomponents-client]
Details (2)
- 4.5.14-1 · all · bookworm
  Not affected
  nvd · httpcomponents-client · debian · bookworm
- 4.5.14-1 · all · bookworm
  Not affected
  nvd · httpcomponents-client · debian · bookworm
[libhttpcore5-java]Not affected
Source package: [httpcomponents-core5]
Details (2)
- 5.2.1-1 · all · bookworm
  Not affected
  nvd · httpcomponents-core5 · debian · bookworm
- 5.2.1-1 · all · bookworm
  Not affected
  nvd · httpcomponents-core5 · debian · bookworm
[libhttpmime-java]Not affected
Source package: [httpcomponents-client]
Details (2)
- 4.5.14-1 · all · bookworm
  Not affected
  nvd · httpcomponents-client · debian · bookworm
- 4.5.14-1 · all · bookworm
  Not affected
  nvd · httpcomponents-client · debian · bookworm

Observed: Oct 25, 2026, 7:23:59 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]