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CVE-2026-71290 Apache HttpClient

Affected softwareApache HttpClient
Severity9.1 Critical CVSS 3.1
WeaknessCWE-295
Published11 Aug 2026
Updated24 Oct 2026

Description

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.33% chance in 30 days

Waratek protection

No exploit published

Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.

VRT has not found a public code change for this CVE yet.

  • Protection none
  • Action not pursued
  • Review automated Upstream data
  • Record active
Decided by Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read
Finding This CVE affects a known product, but nothing published names a fix and nothing published shows an exploit. That is a statement about the evidence, not about the defect — it does not mean the vulnerability is unimportant or unreachable, only that neither of the two things VRT can act on exists.

Affected software and releases

Oracle advisories

AdvisoryTypeQuarterProducts Oracle names in its risk matrix
Oracle Critical Security Patch Update September 2026 ↗ CSPU 2026-Q3 Oracle Communications / Core (Apache HttpClient) (6.1.1-7.0.0)

Oracle components and versions

FamilyComponentVersions, as Oracle lists themRead as
Oracle Communications Core (Apache HttpClient) 6.1.1-7.0.0

Products and versions

1 product, 1 version entry
SourceVendorProductSchemeAffected versions
nvd apache httpclient generic ≥ 5.4 and < 5.6.4

References

URLTags
https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq Mailing List, Release Notes
http://www.openwall.com/lists/oss-security/2026/08/13/6 Mailing List, Third Party Advisory

Timeline

Published2026-08-11By the CVE Program.
NVD record modified2026-10-24NVD's own last-modified date for this record.