---
title: "CVE-2026-90562: LangBot - Authentication Bypass"
description: "LangBot < 4.10.11 contains a broken authentication caused by weak password recovery keys with 24 bits entropy and no rate limiting on reset-password endpoint, letting remote attackers exhaust keyspace and gain admin access, exploit requires knowing admin email."
url: https://panop.io/threat-heartbeat/CVE-2026-90562/
---

# CVE-2026-90562 LangBot - Authentication Bypass

LangBot < 4.10.11 contains a broken authentication caused by weak password recovery keys with 24 bits entropy and no rate limiting on reset-password endpoint, letting remote attackers exhaust keyspace and gain admin access, exploit requires knowing admin email.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.73% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90562)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

13 September 2026

Updated

15 October 2026

Weakness

[CWE-331](https://cwe.mitre.org/data/definitions/331.html)

## Vendor fix

Update to version 4.10.11 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90562](https://nvd.nist.gov/vuln/detail/CVE-2026-90562)
- [https://github.com/langbot-app/LangBot](https://github.com/langbot-app/LangBot)
- [https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/api/http/controller/groups/user.py](https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/api/http/controller/groups/user.py)
- [https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/core/stages/genkeys.py](https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/core/stages/genkeys.py)
- [https://github.com/langbot-app/LangBot/commit/267232c24f93c515d6fd3f7f81c0676066ab1ab8](https://github.com/langbot-app/LangBot/commit/267232c24f93c515d6fd3f7f81c0676066ab1ab8)
- [https://github.com/langbot-app/LangBot/issues/2392](https://github.com/langbot-app/LangBot/issues/2392)
- [https://www.vulncheck.com/advisories/langbot-before-4.10.11-authentication-bypass-via-weak-recovery-key](https://www.vulncheck.com/advisories/langbot-before-4.10.11-authentication-bypass-via-weak-recovery-key)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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