CVE-2026-22677Public exploitNetwork attack vector

Authenticated file read via unvalidated imported workspace

Published May 13, 2026 · Updated May 13, 2026

Path traversal in Hermes WebUI before 0.51.44 allows remote authenticated users to read process-accessible files through session import. _handle_session_import() passes the request-controlled workspace directly into Session without resolve_trusted_workspace(), so file routes resolve relative paths from a blocked root. Authenticated access is required when password protection is enabled; reads are limited to files accessible to the WebUI process.

CVSS severity6.0
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in Hermes WebUI before 0.51.44 allows remote authenticated users to read process-accessible files through session import. _handle_session_import() passes the request-controlled workspace directly into Session without resolve_trusted_workspace(), so file routes resolve relative paths from a blocked root. Authenticated access is required when password protection is enabled; reads are limited to files accessible to the WebUI process.

The record

CVE
CVE-2026-22677
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Nathan Esquenazi
Product
Hermes WebUI
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.51.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Nathan Esquenazi · Hermes WebUIversion=0 <0.51.44

Published CVSS scores

6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo