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Description

Hermes WebUI prior to v0.51.221 contains a path traversal vulnerability that allows attackers to escape the workspace boundary by supplying symlinks that resolve to files or directories outside the designated workspace root. Attackers can exploit the workspace file and listing APIs, which resolve symlink targets without enforcing that the final path remains within the workspace, to read external host files accessible to the server process and disclose sensitive data such as SSH keys, cloud credentials, or application tokens.

PUBLISHED Reserved 2026-06-04 | Published 2026-06-04 | Updated 2026-06-04 | Assigner VulnCheck




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-59 Improper Link Resolution Before File Access ('Link Following')

Product status

Default status
unknown

Any version before 0.51.221
affected

Credits

Chia Min Jun Lennon finder

References

github.com/nesquena/hermes-webui/pull/3398 technical-description

github.com/...ommit/7c48c376299b8058fd35127a59aefadded7e4a92 patch

www.vulncheck.com/...-traversal-via-symlink-workspace-bypass third-party-advisory

cve.org (CVE-2026-11322)

nvd.nist.gov (CVE-2026-11322)

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