# CVE-2026-90562

## Summary

- **CVE ID:** CVE-2026-90562
- **Severity:** CRITICAL
- **CVSS Score:** 9.2 (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-331
- **Published:** Sep 13, 2026
- **Last Modified:** Sep 16, 2026

## Description

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.

## Affected Products

- langbot-app — LangBot (4.0.8.1)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.42%
- **EPSS Percentile:** 36.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._