{"id":"CVE-2026-49973","title":"Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings","summary":"Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without an…","severity":"critical","cvss":9.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cvssSource":"cna","cwe":["CWE-306"],"vendor":"nesquena","product":"hermes-webui","affected":["hermes-webui < 0.51.358"],"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-06-13T02:37:13.947916Z"},"exploitAvailable":true,"published":"2026-06-11","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:05:00.824Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49973","references":[{"url":"https://github.com/nesquena/hermes-webui/releases/tag/v0.51.358","label":"hermes-webui 0.51.358 Release Notes"},{"url":"https://github.com/nesquena/hermes-webui/pull/3964"},{"url":"https://github.com/nesquena/hermes-webui/pull/3973"},{"url":"https://github.com/nesquena/hermes-webui/commit/1126e541325d401538f6a272a9c024c37d47ae08"},{"url":"https://www.vulncheck.com/advisories/hermes-webui-unauthenticated-password-takeover-via-api-settings"}],"tags":["cve.org","exploit-available"],"epss":0.00543,"epssPercentile":0.45894,"ingestedAt":"2026-11-08T14:51:22.380Z","slug":"CVE-2026-49973","body":"## Overview\n\nHermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the _set_password parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable network can send a POST request to the settings endpoint during the first-run setup window to persist an arbitrary password hash, obtain a valid session cookie, and lock out the legitimate operator from their own instance.\n\n## Affected\n\n- `hermes-webui < 0.51.358`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":64,"depthScoreParts":{"impact":51.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}