Vulnerability in Nesquena Hermes-Webui
CVE-2026-58174
Hermes WebUI before 0.51.521 validates the workspace of an imported session under the active named profile but constructs the Session object without setting its profile in the /api/session/import handler, so the imported session is persisted with a null profile. Because a null profile is treated as the default profile by the profile authorization check, a user on the default profile can export the imported session transcript and use its session identifier to read files from the named profile's workspace, defeating the application's profile isolation.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (36.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Nesquena Hermes-Webui — versions 0
Weakness classification (CWE)
References
- github.com/nesquena/hermes-webui/releases/tag/v0.51.521 (release-notes)
- github.com/nesquena/hermes-webui/pull/4489 (technical-description)
- github.com/nesquena/hermes-webui/pull/4506 (issue-tracking)
- github.com/nesquena/hermes-webui/commit/3d5ef4758e920ba6888d49aaa4341de214693496 (patch)
- www.vulncheck.com/advisories/hermes-webui-cross-profile-authorization-bypass-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58174?
- CVE-2026-58174 is a medium-severity vulnerability in Nesquena Hermes-Webui, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 6.5/10. Published 2026-06-30.
- How severe is CVE-2026-58174?
- Medium severity. CVSS v3 base score is 6.5 out of 10.