Platform
php
Component
hybridauth/hybridauth
Fixed in
3.12.1
3.12.2
3.12.3
3.12.3
CVE-2026-4587 affects HybridAuth versions up to 3.12.2, exposing a certificate validation bypass vulnerability within the SSL Handler component. This flaw allows a remote attacker to potentially intercept and manipulate secure communications by circumventing SSL certificate verification. The vendor has not yet responded to the issue report, leaving users vulnerable until a patch is released.
The core impact of CVE-2026-4587 lies in the ability to perform man-in-the-middle (MITM) attacks. An attacker could intercept traffic between HybridAuth-integrated applications and external services, potentially stealing sensitive data like authentication tokens, API keys, or user credentials. This is particularly concerning for applications relying on HybridAuth for social login or OAuth authentication. While the vulnerability is rated as having high complexity and difficult exploitability, successful exploitation could lead to significant data breaches and compromise application security. The lack of vendor response increases the risk as no immediate mitigation is available.
CVE-2026-4587 was published on 2026-03-23. Its CVSS score is LOW (3.7), indicating a relatively low probability of exploitation under normal circumstances. No public proof-of-concept (POC) code has been released as of this writing. The vulnerability's high complexity and difficult exploitability further reduce the likelihood of widespread exploitation. The issue was reported directly to the project, but there has been no response, which warrants continued monitoring.
Exploit Status
EPSS
0.02% (6% percentile)
CISA SSVC
CVSS Vector
Due to the lack of a vendor-provided patch, immediate mitigation options are limited. As a temporary workaround, consider implementing stricter network segmentation to isolate HybridAuth-integrated applications. Employing a Web Application Firewall (WAF) with custom rules to inspect and block suspicious SSL certificate validation requests can provide an additional layer of defense. Monitor network traffic for anomalies and unusual certificate chains. Once a patch is released by the HybridAuth project, prioritize upgrading to the fixed version. After upgrade, confirm by verifying SSL certificate validation is functioning correctly using a tool like openssl s_client against the affected endpoints.
Actualice la biblioteca HybridAuth a una versión posterior a 3.12.2. Esto solucionará la validación incorrecta de certificados SSL en el archivo Curl.php. La actualización se puede realizar a través de Composer o descargando la última versión del repositorio y reemplazando los archivos.
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CVE-2026-4587 is a LOW severity vulnerability in HybridAuth versions up to 3.12.2. It allows remote attackers to bypass SSL certificate checks, potentially enabling man-in-the-middle attacks.
You are affected if you are using HybridAuth version 3.12.2 or earlier. Check your HybridAuth version and upgrade as soon as a patch is available.
Upgrade to a patched version of HybridAuth when available. Until then, implement workarounds like WAF rules and network segmentation.
As of now, there are no public reports of CVE-2026-4587 being actively exploited, but the lack of vendor response warrants caution.
Check the HybridAuth project's website and GitHub repository for updates and advisories related to CVE-2026-4587.
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