CVE-2026-49959

Hermes WebUI before version 0.51.311 contains a remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands by placing malicious executable Git configuration in a workspace repository's .git/config file. Attackers can exploit Git subprocess invocations in api/workspace_git.py through vectors such as core.fsmonitor during git status, protocol.ext.allow with ext:: remotes during git fetch, credential.helper, core.askPass, core.gitProxy, or inherited environment variables including GIT_SSH_COMMAND to achieve arbitrary command execution on the host running the application.

• github.comhttps://github.com/nesquena/hermes-webui/commit/938ac9f55b53def1eefb48c4c42dabaf9c22e99c
• github.comhttps://github.com/nesquena/hermes-webui/pull/3776
• github.comhttps://github.com/nesquena/hermes-webui/releases/tag/v0.51.311
• www.vulncheck.comhttps://www.vulncheck.com/advisories/hermes-webui-rce-via-git-configuration-injection