What’s Vulnerable › Vulnerabilities

CVE-2026-22677: Hermes WebUI < 0.51.44 Path Traversal via Session Import Endpoint

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-13 · updated 2026-10-26
• Weakness: CWE-22

Description

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.

Affected products

• nesquena hermes-webui: before 0.51.44 — fixed in 0.51.44

How to fix

Upgrade to a fixed version: nesquena hermes-webui 0.51.44. Check the vendor advisory for mitigations.

References

• https://github.com/nesquena/hermes-webui/commit/f00cb74f776f22f02f5eb6b39dfb389f87cc7fd3
• https://github.com/nesquena/hermes-webui/pull/2048
• https://github.com/nesquena/hermes-webui/releases/tag/v0.51.44
• https://www.vulncheck.com/advisories/hermes-webui-path-traversal-via-session-import-endpoint
• https://github.com/nesquena/hermes-webui/pull/2048

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