CVE-2026-111704
LangChat through commit 2a6285a Missing Authentication on REST API Controllers
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
LangChat through commit 2a6285a contains a missing authentication vulnerability that allows unauthenticated remote attackers to access REST controllers because no Sa-Token interceptor is registered. Attackers can query /api/v1/auth/users to read plaintext passwords, retrieve LLM provider API keys, create super-admin accounts, and modify or delete data.
| CWE | CWE-306 |
| Vendor | langchat |
| Product | langchat |
| Published | Oct 16, 2026 |
Stay Ahead of the Next One
Get instant alerts for langchat langchat
Be the first to know when new critical vulnerabilities affecting langchat langchat are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
LangChat / langchat
0 ≤ 2a6285a6b8c51d51cdc599771bb667a30bc03f5c
References
hackmd.io: https://hackmd.io/@hieuPenguinnn/langchat-missing-global-auth-credential-exposure github.com: https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-server/src/main/java/cn/langchat/server/config/WebAsyncConfig.java#L17-L33 github.com: https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/controller/AigcUserController.java#L25-L60 github.com: https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/service/impl/AuthServiceImpl.java#L51-L58 vulncheck.com: https://www.vulncheck.com/advisories/langchat-through-commit-2a6285a-missing-authentication-on-rest-api-controllers
Credits
hieuPenguinnn