LangBot before 4.10.11 Authentication Bypass via Weak Recovery Key
Priority HIGH 75CWE-331Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
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 through concurrent requests to reset the admin password and gain account access.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00735 54th percentileScored 2026-11-07
Fix Fixed LangBot (langbot-app): 4.10.11
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| langbot-app | LangBot | 4.0.8.1 to before 4.10.11 | 4.10.11 | Patch available | CNA |
- LangBot Vendorlangbot-app Affected 4.0.8.1 to before 4.10.11 Fixed in 4.10.11 Patch available CNA
Remediation
- Fix · CNA LangBot (langbot-app) Fixed in 4.10.11
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90562
- 2026-10-03 Alias added: GHSA-6h2j-ghfm-664v
References
More langbot-app vulnerabilities
- TI-2026-61802 LangBot through 0.4.17 Unauthenticated Plugin Registration via WebSocket CVSS 4.0HIGH 8.8
- TI-2025-37274 LangBot has a cross-directory file upload vulnerability, which could lead to system takeover CVSS 4.0HIGH 8.6
- TI-2026-39312 LangBot: Authenticated RCE Via MCP Configuration CVSS 3.1HIGH 8.8
- TI-2026-76465 Missing Lark/Feishu webhook authenticity check in LangBot CVSS 4.0HIGH 8.3
Sources
- CVE-2026-90562 · CVE Program
- CVE-2026-90562 · NVD
- FIRST EPSS
- GHSA-6h2j-ghfm-664v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences