External risk intelligence

LangBot Weak Password Reset Account Access

CVE advisorySeverity: CRITICAL (CVSS 9.2)

CVE-2026-90562

The vulnerability exists in a password reset endpoint, which is a core, unauthenticated web feature designed to be accessible over the internet to allow users to recover account access.

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

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory concerns a security flaw in the LangBot application that could allow unauthorized access to administrator accounts. The issue stems from how password recovery keys are generated and how the system handles password reset requests, potentially enabling attackers to bypass security measures. The main concern is confirming relevance and exposure.

  • Weak password recovery keys allow unauthorized access.
  • Core feature vulnerability; widespread exposure potential.
  • Verify if this system is in use and assess impact.

Attack Path

How an attacker could exploit the issue

An attacker who knows an administrator's email address can target the password recovery feature. By repeatedly sending requests to reset the password without any limits, an attacker can eventually guess the weak recovery key and gain access to the administrator account.

  • Unauthenticated reset-password endpoint exposed externally.
  • Weak password recovery keys can be exhausted.
  • Unauthorized administrator account access.

Live Threat

Current exploitation, exposure, and threat context

Remote attackers who know the administrator's email could gain account access by repeatedly attempting to reset the admin password. This is possible because the system generates weak password recovery keys and lacks rate limiting on the password reset endpoint.

  • Admin account access.
  • Exploiting weak recovery keys.
  • Unauthorized account control.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in LangBot's password recovery mechanism is likely the responsibility of the Application Owner or Platform Team that manages the LangBot instance. The first practical step is to identify all instances of LangBot, confirm their internet reachability and business criticality, and then determine the accountable owner for remediation.

  • Application owners must address this.
  • Verify external exposure and business impact.
  • Plan immediate remediation or mitigation.

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 LangBot?

LangBot is an application designed to manage automated language-based tasks and interactions. It typically serves as an interface for users and administrators to perform various utility functions. This advisory specifically impacts the authentication and account recovery components within the software.

What does CWE-331 mean for CVE-2026-90562?

CWE-331 refers to Insufficient Entropy. In this vulnerability, the recovery keys generated by LangBot for password resets lack enough randomness to be secure. Because the keys are too predictable, it becomes mathematically feasible for an attacker to guess them, allowing them to bypass the intended password recovery security mechanism.

How can an attacker trigger this vulnerability?

An attacker needs the administrator's email address and access to the unauthenticated password reset endpoint. By sending many concurrent reset requests, they can cycle through the small set of possible recovery keys until they find the correct one. Normal, single-use legitimate password resets by standard users will not trigger this condition.

Is my LangBot instance at risk?

If your LangBot instance is accessible via the internet, Halo Surface Signal flags it as very likely to be affected. Because the password reset feature is a core, unauthenticated web function, it is inherently reachable by external entities, increasing the risk that your administrative accounts could be targeted.

What steps should I take if I run LangBot?

First, locate all running instances of LangBot within your environment. Verify which ones are exposed to the internet and confirm their business role. Identify the internal team responsible for managing these instances and coordinate with them to ensure the application is updated to version 4.10.11 or later, which addresses the entropy and rate-limiting issues.

References