Public vulnerability disclosure

CVE-2026-120315

LobeHub Chat 1.84.26 before 2.1.49 Path Traversal RCE via writeTempFile

publishedCWE-22

LobeHub Chat from 1.84.26 before 2.1.49 contains a path traversal vulnerability that allows authenticated users to write arbitrary files by supplying unsanitized file names to writeTempFile(). Attackers can create a file record via file.createFile with a traversal name, then trigger document parsing to overwrite application files like startServer.js for code execution or denial of service.

Investigate in Cyber JSON Markdown

Technical severity8.7 highCVSS 4.0 · CNA: VulnCheck

Published2026-11-02Source updated 2026-11-02

Collected2026-11-021 attributed source

Fixes and workarounds

No remediation reported in collected sources.

Missing remediation information is not evidence that no patch exists.

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
chat lobehub `%40lobehub/chat` npm	≥ 1.84.26; < 2.1.49 (affected, semver) 2.1.49 (unaffected, semver) Other versions: unaffected	CNA: VulnCheck

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 8.7 high	`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`	CNA: VulnCheck
3.1 / 8.8 high	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`	CNA: VulnCheck

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://github.com/lobehub/lobehub/security/advisories/GHSA-2g9j-v25c-4j97CNA: VulnCheck · vendor-advisory
https://www.vulncheck.com/advisories/lobehub-chat-1.84.26-before-2.1.49-path-traversal-rce-via-writetempfileCNA: VulnCheck · third-party-advisory