Vulnerability-Lookup

CVE-2026-71290 (GCVE-0-2026-71290)

Vulnerability from cvelistv5 – Published: 2026-08-11 20:33 – Updated: 2026-08-13 16:18

Title

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

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.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 19:19 UTC

CWE

CWE-295 - Improper Certificate Validation

Assigner

apache

References

2 references

URL	Tags
https://lists.apache.org/thread/bhf7g2zwpom2ohvwj…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/08/13/6

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache HttpComponents Client	Affected: 5.4-alpha , ≤ 5.6.3 (semver)

Credits

n0mi1k

Show details on NVD website

JSON

To clipboard

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GHSA-72Q8-9RGW-5G6J

Vulnerability from github – Published: 2026-08-11 21:33 – Updated: 2026-08-13 18:31

Details

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.

Severity

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-71290"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-11T21:17:51Z",
    "severity": "CRITICAL"
  },
  "details": "Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer.\u00a0HostnameVerificationPolicy#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\n the server can impersonate the server by presenting a valid certificate\n for a different domain.\u00a0\n\n\nPlease note the classic version of HttpClient is not affected by this vulnerability.\u00a0\n\nAffected users are recommended to upgrade to at least version 5.6.4, which fixes the issue.",
  "id": "GHSA-72q8-9rgw-5g6j",
  "modified": "2026-08-13T18:31:22Z",
  "published": "2026-08-11T21:33:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71290"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/13/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

ubuntu-cve-2026-71290

Vulnerability from osv_ubuntu

Published

2026-08-13 00:00

Modified

2026-08-13 00:00

Summary

Details

Severity

9.1 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-71290	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-71290	REPORT
	https://lists.apache.org/thread/bhf7g2zwpom2ohvwj…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libhttpcore5-java",
            "binary_version": "5.1.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "httpcomponents-core5",
        "purl": "pkg:deb/ubuntu/httpcomponents-core5@5.1.3-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
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        }
      ],
      "versions": [
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        "5.1.2-2",
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    },
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        "binaries": [
          {
            "binary_name": "libhttpcore5-java",
            "binary_version": "5.2.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "httpcomponents-core5",
        "purl": "pkg:deb/ubuntu/httpcomponents-core5@5.2.2-1?arch=source\u0026distro=noble"
      },
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      ],
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      ]
    },
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      },
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    }
  ],
  "aliases": [],
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  "id": "UBUNTU-CVE-2026-71290",
  "modified": "2026-08-13T00:00:00Z",
  "published": "2026-08-13T00:00:00Z",
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    {
      "type": "REPORT",
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    },
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    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
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    "CVE-2026-71290"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-71290 (GCVE-0-2026-71290)

GHSA-72Q8-9RGW-5G6J

ubuntu-cve-2026-71290

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature