---
id: CVE-2026-90562
title: >-
  LangBot before 4.10.11 generates password recovery keys with only 24 bits of
  entropy and applies no rate limiting to the unauthenticated reset-password
  endpoint
summary: >-
  LangBot before 4.10.11 generates password recovery keys with only 24 bits of
  entropy and applies no rate limiting to the unauthenticated reset-password
  endpoint. Remote attackers knowing the administrator email can exhaust the
  keyspace t…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-331
vendor: langbot-app
product: LangBot
affected:
  - LangBot >= 4.0.8.1 < 4.10.11
published: '2026-09-13'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:47.433'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90562'
references:
  - url: 'https://github.com/langbot-app/LangBot'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/api/http/controller/groups/user.py
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/core/stages/genkeys.py
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/langbot-app/LangBot/commit/267232c24f93c515d6fd3f7f81c0676066ab1ab8
    label: disclosure@vulncheck.com
  - url: 'https://github.com/langbot-app/LangBot/issues/2392'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/langbot-before-4.10.11-authentication-bypass-via-weak-recovery-key
    label: disclosure@vulncheck.com
  - url: 'https://github.com/langbot-app/LangBot/issues/2392'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00735
epssPercentile: 0.52493
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T14:01:27.102549Z'
ingestedAt: '2026-09-14T15:23:07.471Z'
---

## Overview

LangBot before 4.10.11 generates password recovery keys with only 24 bits of entropy and applies no rate limiting to the unauthenticated reset-password endpoint. Remote attackers knowing the administrator email can exhaust the keyspace through concurrent requests to reset the admin password and gain account access.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.