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.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-78"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49959.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.51.311"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"original_tag": "v0.51.311",
"range": [
{
"fixed": "938ac9f55b53def1eefb48c4c42dabaf9c22e99c"
}
],
"source": "REFERENCES_TAG"
},
{
"range": [
{
"fixed": "938ac9f55b53def1eefb48c4c42dabaf9c22e99c"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.51.311"
}
],
"source": "DESCRIPTION"
}
]
}