External risk intelligence

Password Reset Brute Force Allows Account Takeover.

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2026-108335

The vulnerability exists in password reset functionality within an application. Password reset flows are standard, internet-facing features of web applications and services, making them commonly accessible and reachable from the public internet in standard deployment patterns.

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a critical vulnerability in an application's password reset feature, which, if enabled and email is configured, allows attackers to take over any account through brute-force attacks. While device credentials and customer data are not at risk, an attacker could gain administrative access, potentially reconfiguring the service or requesting log collection. The primary concern is confirming relevance and exposure to this type of administrative access.

  • Attackers can brute-force password resets.
  • It allows unauthorized administrative control.
  • Confirm if this application feature is enabled.

Attack Path

How an attacker could exploit the issue

An attacker, with no prior authentication, can initiate a password reset for any account. Since there are no limits on the number of attempts to enter the reset code, the attacker can repeatedly guess the code until they gain access to the account. This could potentially lead to an attacker taking over an administrative account within the application.

  • Requires no authentication or prior access.
  • Attacker guesses reset codes repeatedly.
  • Risk of unauthorized administrative access.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to take over any user account when the password reset functionality is enabled and email is configured, due to a lack of rate limiting on reset code attempts. Device credentials and customer data cannot be accessed.

  • User account access.
  • Brute-force attack on reset codes.
  • Unauthorized administrative actions.

Operational Fix

Recommended remediation, mitigation, and detection steps

The application owner or the platform team is likely responsible for addressing this vulnerability, as it affects password reset functionality. The first practical step is to identify all instances of the affected application, confirm its reachability and business criticality, and then determine the accountable owner for remediation planning.

  • Application or platform teams own the issue.
  • Verify application reachability and criticality.
  • Plan remediation based on identified risk.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is the application feature affected by CVE-2026-108335?

This CVE concerns the password reset functionality within an application. This feature is typically used to recover account access by sending a verification code to a registered email address. When email is configured, the application allows users to request a reset, which is a standard component for managing user identity and account recovery in web-based services.

What does CWE-640 mean for CVE-2026-108335?

CWE-640 refers to a failure to check for a sufficient number of attempts for a password reset. In the context of this CVE, it means the application does not limit how many times a user can guess the reset code. Because there is no rate limiting, an attacker can systematically try every possible code combination—a brute-force attack—until they successfully guess the correct one and take over an account.

How can an attacker trigger this vulnerability?

An attacker triggers this by initiating a password reset for any account, provided the feature is enabled and email is configured. The attack requires no prior authentication or system access. Note that simply having the feature enabled does not inherently compromise the system; the vulnerability specifically relies on the absence of rate limiting during the code entry phase to succeed.

Is my system at risk according to Halo Surface Signal?

Halo Surface Signal identifies this as a 'Likely' risk because password reset flows are standard, internet-facing features. If your application's reset functionality is reachable from the public internet, it falls into the classification of an external exposure. You should evaluate whether your deployment patterns make this specific authentication recovery path accessible to unauthorized parties.

What should I do if I run this technology?

Your first step is to locate all instances of the application where this password reset feature is active. Determine if these instances are exposed to the internet or internal networks, and assess their business criticality. Once mapped, coordinate with your platform or application owners to confirm the current configuration and prioritize the planning of necessary security remediations.

References