{"id":"CVE-2026-49958","state":"PUBLISHED","title":"Hermes WebUI < 0.51.303 TOCTOU Race Condition via git_discard","description":"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.","publishedAt":"2026-06-09T16:35:42.411Z","updatedAt":"2026-07-14T21:33:30.028Z","severity":{"score":4.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["nesquena hermes-webui"],"affected":[{"vendor":"nesquena","product":"hermes-webui","packageURL":"pkg:github/nesquena/hermes-webui","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"0.51.303","versionType":"semver"}],"repo":"https://github.com/nesquena/hermes-webui"}],"references":["https://github.com/nesquena/hermes-webui/releases/tag/v0.51.303","https://github.com/nesquena/hermes-webui/pull/3702","https://github.com/nesquena/hermes-webui/pull/3756","https://github.com/nesquena/hermes-webui/commit/4580f584964d640b95c4ffc9245a21ab926bec73","https://www.vulncheck.com/advisories/hermes-webui-toctou-race-condition-via-git-discard"],"weaknesses":["CWE-367"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49958.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49958","state":"PUBLISHED","datePublished":"2026-06-09T16:35:42.411Z","dateUpdated":"2026-07-14T21:33:30.028Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-02T16:30:15.233Z"},"containers":{"cna":{"title":"Hermes WebUI < 0.51.303 TOCTOU Race Condition via git_discard","descriptions":[{"lang":"en","value":"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. 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