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CVE-2026-111704

9.8 · CRITICAL

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.

Published Oct 16, 2026CWE-306EPSS 0.65%

Overview

CVE-2026-111704 is a critical-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/controller/AigcUserController.java#L25-L60GitHubgithub.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-auth/src/main/java/cn/langchat/auth/service/impl/AuthServiceImpl.java#L51-L58GitHubgithub.com/LangChat/langchat/blob/2a6285a6b8c51d51cdc599771bb667a30bc03f5c/langchat-server/src/main/java/cn/langchat/server/config/WebAsyncConfig.java#L17-L33Refhackmd.io/@hieuPenguinnn/langchat-missing-global-auth-credential-exposureRefwww.vulncheck.com/advisories/langchat-through-commit-2a6285a-missing-authentication-on-rest-api-controllersRefhackmd.io/@hieuPenguinnn/langchat-missing-global-auth-credential-exposure

How CyberStrike helps

Frequently asked questions

What is CVE-2026-111704?

CVE-2026-111704 is a critical-severity vulnerability. It was published on October 16, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-111704?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-111704?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-111704?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-111704 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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