CVE-2026-90562

HIGH 8.1

LangBot before 4.10.11 Authentication Bypass via Weak Recovery Key

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-331
Vendor	langbot-app
Product	langbot
Published	Sep 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

langbot-app / LangBot

4.0.8.1 < 4.10.11

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 George Chen