CVE-2026-49959

HIGH 8.8

Hermes WebUI < 0.51.311 RCE via Git Configuration Injection

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78
Vendor	nesquena
Product	hermes-webui
Published	Jun 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

nesquena / hermes-webui

0 < 0.51.311

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Chia Min Jun Lennon