Nesquena Hermes WebUI Arbitrary File Deletion via Unvalidated session_id
Priority LOW 34CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
Hermes WebUI contains an arbitrary file deletion vulnerability in the /api/session/delete endpoint that allows authenticated attackers to delete files outside the session directory by supplying an absolute path or path traversal payload in the session_id parameter. Attackers can exploit unvalidated session identifiers to construct paths that bypass the SESSION_DIR boundary and delete writable JSON files on the host system.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00475 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed hermes-webui (nesquena): PR #409
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nesquena | hermes-webui | before PR #409 | PR #409 | Patch available | CNA |
- hermes-webui Vendornesquena Affected before PR #409 Fixed in PR #409 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:get-hermes:hermes_web_ui:*:*:*:*:*:*:*:* | before 0.50.32 | Vulnerable | Get-hermes |
- cpe:2.3:a:get-hermes:hermes_web_ui:*:*:*:*:*:*:*:* Versions before 0.50.32 Vulnerable ·Get-hermes
Remediation
- Fix · CNA hermes-webui (nesquena) Fixed in PR #409
Timeline
- 2026-10-02 Threatist record created from CVE-2026-6832
- 2026-10-03 Alias added: GHSA-pwfc-qm9r-p6h4
- 2026-10-25 EPSS moved to the below the 50th percentile
References
More nesquena vulnerabilities
- TI-2026-36807 Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings CVSS 4.0CRITICAL 9.2
- TI-2026-39885 Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint CVSS 4.0MEDIUM 6.9
- TI-2026-39878 Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint CVSS 4.0HIGH 7.1
- TI-2026-39877 Hermes WebUI < 0.51.443 - Broken Access Control in /api/session Endpoint CVSS 4.0HIGH 7.1
- TI-2026-36799 Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search CVSS 4.0HIGH 7.1
- TI-2026-09773 Hermes WebUI before 0.51.221 Path Traversal via Symlink Workspace Bypass CVSS 4.0HIGH 7.1
Sources
- CVE-2026-6832 · CVE Program
- CVE-2026-6832 · NVD
- FIRST EPSS
- GHSA-pwfc-qm9r-p6h4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences