CVE-2026-111704
LangChat through commit 2a6285a Missing Authentication on REST API Controllers
LangChat langchat
CVSS
9.3CriticalExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 21 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.51%Chance of exploitation activity in the next 30 days, higher than 42% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
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.
Text from CVE List
Affected versions 1
- langchataffected: all versions through 2a6285a6b8c51d51cdc599771bb667a30bc03f5cCVE List
References 5
- vulncheck.com/advisories/langchat-through-commit-2a6285a-missing-authentication-on-rest-api-controllersAdvisoryvia CVE List
- hackmd.io/@hieuPenguinnn/langchat-missing-global-auth-credential-exposureExploitvia CVE List
- github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-server/src/main/java/cn/langchat/server/config/WebAsyncConfig.java#L17-L33Referencevia CVE List
- github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/controller/AigcUserController.java#L25-L60Referencevia CVE List
- github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/service/impl/AuthServiceImpl.java#L51-L58Referencevia CVE List