CVE-2026-49958Medium· 5.0▾ TwilightPoC availableHermes WebUI before version 0.51.303 contains a time-of-check time-of-use (TOCTOU) race condition vulnerability in the git_discard function within api/workspace_git.py that allows attackers to delete files outside the configured workspac…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 27.5 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.08%
Hermes WebUI before version 0.51.303 contains a time-of-check time-of-use (TOCTOU) race condition vulnerability in the git_discard function within api/workspace_git.py that allows attackers to delete files outside the configured workspace boundary by replacing a validated path component with a symlink after validation but before deletion. Attackers can substitute a workspace-controlled path component with a symlink pointing to an external directory between the safe_resolve_ws() validation step and the subsequent Path.unlink() or shutil.rmtree() deletion call, causing the delete operation to follow the symlink and remove arbitrary files outside the workspace.
hermes-webui < 0.51.303Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-49956Medium· 6.5Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search
CVE-2026-49973Critical· 9.4Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings
CVE-2026-58123Critical· 9.8Hermes WebUI < 0.51.788 Unauthenticated RCE via Terminal API
CVE-2026-58174Medium· 6.5Hermes WebUI < 0.51.521 - Cross-Profile Authorization Bypass via Unset Session Profile on Import
CVE-2026-55197Medium· 6.5Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts
CVE-2026-55198Medium· 6.5Hermes WebUI before 0.51.443 contains an authorization bypass vulnerability in the session export endpoint that allows authenticated users to access sessions from other profiles