{"id":"CVE-2026-111704","title":"LangChat through commit 2a6285a Missing Authentication on REST API Controllers","summary":"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…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-306"],"vendor":"LangChat","product":"langchat","affected":["langchat <= 2a6285a6b8c51d51cdc599771bb667a30bc03f5c"],"published":"2026-10-16","updated":"2026-10-16","sourceUpdated":"2026-10-16T17:39:56.489Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111704","references":[{"url":"https://hackmd.io/@hieuPenguinnn/langchat-missing-global-auth-credential-exposure"},{"url":"https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-server/src/main/java/cn/langchat/server/config/WebAsyncConfig.java#L17-L33"},{"url":"https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/controller/AigcUserController.java#L25-L60"},{"url":"https://github.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/service/impl/AuthServiceImpl.java#L51-L58"},{"url":"https://www.vulncheck.com/advisories/langchat-through-commit-2a6285a-missing-authentication-on-rest-api-controllers","label":"VulnCheck Advisory: LangChat through commit 2a6285a Missing Authentication on REST API Controllers"}],"tags":["cve.org"],"ingestedAt":"2026-10-16T18:43:08.652Z","slug":"CVE-2026-111704","body":"## Overview\n\nLangChat 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.\n\n## Affected\n\n- `langchat <= 2a6285a6b8c51d51cdc599771bb667a30bc03f5c`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}