CVE-2026-120315 lobehub CVE debrief

Who should care

Defenders responsible for LobeHub Chat installations, security teams, and IT personnel should be aware of this vulnerability and take steps to mitigate it. They should prioritize verifying and updating LobeHub Chat installations to version 2.1.49 or later, and restrict access to authenticated users. Additionally, they should review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, and IT

Why it matters

CVE-2026-120315 is a high-severity path traversal vulnerability in LobeHub Chat that allows authenticated users to write arbitrary files, potentially leading to code execution or denial of service. Defenders should prioritize verifying and updating LobeHub Chat installations to version 2.1.49 or later, and restrict access to authenticated users.

• Code execution or denial of service via overwriting application files
• Potential for lateral movement and further exploitation
• Need for verification and updating of LobeHub Chat installations

Technical summary

The vulnerability allows authenticated users to write arbitrary files by providing unsanitized file names to the writeTempFile() function. This can lead to code execution or denial of service by overwriting application files like startServer.js. The vulnerability has a high CVSS score of 8.7 and is classified as HIGH severity. There is no information on known exploits or affected systems. Defenders should prioritize verifying and updating LobeHub Chat installations to version 2.1.49 or later, and restrict access to authenticated users.

Defensive priority

Defenders should prioritize verifying and updating LobeHub Chat installations to version 2.1.49 or later, and restrict access to authenticated users.

Recommended defensive actions

• Verify LobeHub Chat installations and update to version 2.1.49 or later
• Restrict access to authenticated users
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but do not specify which versions are affected or provide remediation steps beyond updating to version 2.1.49 or later. The vulnerability has a high CVSS score of 8.7 and is classified as HIGH severity. There is no information on known exploits or affected systems. Defenders should verify LobeHub Chat installations and update to version 2.1.49 or later. The CVE record was published on 2026-11-02T03:17:29.457Z and has not been modified since then.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.