What’s Vulnerable › Vulnerabilities

CVE-2026-6829: nesquena hermes-webui Arbitrary Workspace Directory Access

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-21 · updated 2026-10-26
• Weakness: CWE-22

Description

nesquena hermes-webui contains a trust-boundary failure vulnerability that allows authenticated attackers to set or change a session workspace to an arbitrary existing directory on disk by manipulating workspace path parameters in endpoints such as /api/session/new, /api/session/update, /api/chat/start, and /api/workspaces/add. Attackers can repoint a session workspace to a directory outside the intended trusted root and then use ordinary file read and write APIs to access or modify files outside the intended workspace boundary within the permissions of the hermes-webui process.

References

• https://github.com/nesquena/hermes-webui/commit/2a7a5ddfaf39e3b0094b7ac37e9f1dbcf40a3918
• https://github.com/nesquena/hermes-webui/pull/416
• https://github.com/nesquena/hermes-webui/releases/tag/v0.50.34
• https://www.vulncheck.com/advisories/nesquena-hermes-webui-arbitrary-workspace-directory-access

Get alerted when CVE-2026-6829 or the next vulnerability affects your stack