nesquena hermes-webui up to 0.51.43 Session Import Endpoint workspace path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in nesquena hermes-webui up to 0.51.43. This vulnerability affects unknown code of the component Session Import Endpoint. The manipulation of the argument workspace leads to path traversal. This vulnerability is uniquely identified as CVE-2026-22677. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in nesquena hermes-webui up to 0.51.43. It has been rated as critical. This issue affects an unknown functionality of the component Session Import Endpoint. The manipulation of the argument workspace with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

Hermes WebUI prior to 0.51.44 contains a path traversal vulnerability in the session import endpoint that allows authenticated attackers to read arbitrary files by importing a crafted session with an unrestricted workspace value. Attackers can supply a blocked filesystem root in the workspace field and subsequently use relative paths in the session file API to access any file readable by the WebUI process.

The weakness was disclosed by Chia Min Jun Lennon. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-22677 since 01/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 0.51.44 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch f00cb74f776f22f02f5eb6b39dfb389f87cc7fd3 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• nesquena

Name

• hermes-webui

Version

• 0.51.0
• 0.51.1
• 0.51.2
• 0.51.3
• 0.51.4
• 0.51.5
• 0.51.6
• 0.51.7
• 0.51.8
• 0.51.9
• 0.51.10
• 0.51.11
• 0.51.12
• 0.51.13
• 0.51.14
• 0.51.15
• 0.51.16
• 0.51.17
• 0.51.18
• 0.51.19
• 0.51.20
• 0.51.21
• 0.51.22
• 0.51.23
• 0.51.24
• 0.51.25
• 0.51.26
• 0.51.27
• 0.51.28
• 0.51.29
• 0.51.30
• 0.51.31
• 0.51.32
• 0.51.33
• 0.51.34
• 0.51.35
• 0.51.36
• 0.51.37
• 0.51.38
• 0.51.39
• 0.51.40
• 0.51.41
• 0.51.42
• 0.51.43

License

• open-source

Website

• Product: https://github.com/nesquena/hermes-webui/

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