CVE-2026-34215 in parse-server
Summary
by MITRE • 03/31/2026
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.63 and 9.7.0-alpha.7, the verify password endpoint returns unsanitized authentication data, including MFA TOTP secrets, recovery codes, and OAuth access tokens. An attacker who knows a user's password can extract the MFA secret to generate valid MFA codes, defeating multi-factor authentication protection. This issue has been patched in versions 8.6.63 and 9.7.0-alpha.7.
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Analysis
by VulDB Data Team • 04/01/2026
The vulnerability described in CVE-2026-34215 affects Parse Server, a popular open-source backend framework designed for Node.js environments. This critical security flaw resides in the authentication verification endpoint where sensitive user data is improperly sanitized during the response process. The affected versions prior to 8.6.63 and 9.7.0-alpha.7 expose confidential information that should remain protected within the authentication flow. The vulnerability specifically impacts the verify password endpoint which inadvertently includes MFA TOTP secrets, recovery codes, and OAuth access tokens in its response payload. This represents a fundamental breakdown in the principle of least privilege and data protection within the authentication system.
The technical implementation of this vulnerability stems from improper data sanitization practices within the authentication verification process. When a user attempts to authenticate, the system should only return necessary verification information without exposing sensitive multi-factor authentication components or third-party authentication tokens. However, the flawed implementation allows these critical security elements to be transmitted in cleartext within the API response. This creates a direct pathway for attackers to exploit the system using knowledge of a user's password, enabling them to extract the MFA secret and subsequently generate valid authentication codes. The vulnerability directly maps to CWE-200, which addresses improper exposure of sensitive information, and represents a significant failure in information hiding principles.
The operational impact of this vulnerability extends far beyond simple credential theft, as it completely undermines the multi-factor authentication security model that organizations rely upon for user protection. An attacker who gains access to a user's password can leverage this vulnerability to bypass the additional security layer that MFA provides, effectively neutralizing the protection mechanism. This exploitation capability enables unauthorized access to user accounts and potentially leads to broader system compromise through privilege escalation attacks. The vulnerability also affects OAuth integration points, meaning that attackers could potentially harvest access tokens to gain unauthorized access to third-party services that rely on the Parse Server for authentication. This represents a sophisticated attack vector that aligns with ATT&CK technique T1078.004, which covers valid accounts obtained through credential access, and T1566.002, which involves spearphishing with links.
Organizations utilizing Parse Server must immediately implement mitigations to address this vulnerability through the recommended version upgrades to 8.6.63 or 9.7.0-alpha.7. Additionally, administrators should conduct comprehensive audits of their authentication systems to identify any potential exploitation attempts that may have occurred prior to the patch deployment. The remediation process should include monitoring for unusual authentication patterns and implementing additional access controls to limit the impact of compromised accounts. Security teams should also review their incident response procedures to ensure they can effectively detect and respond to similar vulnerabilities in their infrastructure. Organizations should consider implementing network segmentation and additional monitoring controls to detect unauthorized access attempts that may leverage this vulnerability, as the exposure of MFA secrets and OAuth tokens creates a significant risk for account takeover scenarios that align with ATT&CK technique T1566.001 for credential harvesting.