Is CVE-2026-49959 actively exploited?

No active exploitation of CVE-2026-49959 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-49959 be exploited remotely?

Yes. CVE-2026-49959 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-49959?

CVE-2026-49959 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-49959

CWE-78Published: June 9, 2026· Updated: Jun 9, 2026

8.8

CVSS v3.1

EPSS:0.32%probability of exploitation in 30 daysPercentile:55.8th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-49959 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.