CVE-2026-4587
Received Received - Intake
Improper Certificate Validation in HybridAuth SSL Handler (Remote

Publication date: 2026-03-23

Last updated on: 2026-03-23

Assigner: VulDB

Description
A vulnerability was found in HybridAuth up to 3.12.2. This issue affects some unknown processing of the file src/HttpClient/Curl.php of the component SSL Handler. The manipulation of the argument curlOptions results in improper certificate validation. The attack can be launched remotely. This attack is characterized by high complexity. The exploitability is assessed as difficult. The project was informed of the problem early through an issue report but has not responded yet.
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Meta Information
Published
2026-03-23
Last Modified
2026-03-23
Generated
2026-06-16
AI Q&A
2026-03-23
EPSS Evaluated
2026-06-14
NVD
CVE-2026-4587
EUVD
EUVD-2026-14425
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
hybridauth hybridauth to 3.12.2 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-295 The product does not validate, or incorrectly validates, a certificate.
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
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Executive Summary

This vulnerability exists in HybridAuth versions up to 3.12.2, specifically in the SSL Handler component within the file src/HttpClient/Curl.php. It involves improper certificate validation caused by manipulation of the curlOptions argument. This flaw can be exploited remotely but requires high complexity and is considered difficult to exploit.

Impact Analysis

The vulnerability can lead to improper certificate validation, which may allow an attacker to interfere with the integrity of SSL/TLS connections made by HybridAuth. This could result in unauthorized actions or data manipulation (integrity impact) without compromising confidentiality or availability. However, the exploit requires high complexity and is difficult to execute.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

As of the latest information, the HybridAuth project has not responded or published a fix for this vulnerability.

Given the vulnerability involves improper certificate validation in the SSL Handler component (src/HttpClient/Curl.php), immediate mitigation steps could include:

  • Avoid using affected versions of HybridAuth (up to 3.12.2) in sensitive environments.
  • Monitor for updates or patches from the HybridAuth project.
  • Implement additional network-level security controls such as strict TLS inspection or firewall rules to limit exposure.
  • Consider disabling or restricting features that rely on the vulnerable SSL Handler until a fix is available.
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