Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-71290

Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM)
Back to all
CVE

CVE-2026-71290

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

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.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

http://www.openwall.com/lists/oss-security/2026/08/13/6, https://repo.maven.apache.org/maven2/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71290.json, https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq, https://nvd.nist.gov/vuln/detail/CVE-2026-71290

Severity

9.1

CVSS Score
0
10

Basic Information

Base CVSS
9.1
EPSS Probability
0.00242%
EPSS Percentile
0.15207%
Introduced Version
84cccfe6300bca6b37abd05af527df08a781b677,0
Fix Available
36508cead5c4388d04d20aa7efad5a68595631a0

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading