Is CVE-2026-49957 actively exploited?

No active exploitation of CVE-2026-49957 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-49957 be exploited remotely?

Yes. CVE-2026-49957 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-49957?

CVE-2026-49957 has a CVSS score of 7.7 (HIGH).

HOME VULNERABILITIESCVE-2026-49957

HIGH

CVE-2026-49957

CWE-22Published: June 9, 2026· Updated: Jun 10, 2026

7.7

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.9th

Official Description

Hermes WebUI before version 0.51.296 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the SSH/remote terminal profile workspace resolution logic within _remote_terminal_workspace_candidate(). Attackers can configure a remote terminal working directory to a system directory such as /etc, causing the workspace resolution path to accept it as a trusted local workspace root before the _is_blocked_workspace_path() guard executes, enabling read access to local system files through workspace file-read helpers.

NVD Source

Technical Analysis

CVE-2026-49957 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), with a CVSS base score of 7.7.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.