{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-55196 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-55196 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-55196 is a critical authentication bypass vulnerability in hermes-webui, published on 17 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-55196 and fix it if it is affected.\n\nWhat it is: CVE-2026-55196 is a critical authentication bypass vulnerability in hermes-webui, published on 17 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-55196 in the wild and no public exploit code.\n\nAffected product: hermes-webui. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-55196/ (Markdown: https://insights.sbomify.com/CVE-2026-55196/index.md)","id":"CVE-2026-55196","markdown":"https://insights.sbomify.com/CVE-2026-55196/index.md","name":"CVE-2026-55196","record":{"aliases":["GHSA-5j37-rf54-82q2"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"Hermes WebUI","requires_auth":"none","summary":"Unauthenticated attackers can register passkeys to gain administrative control when passkey support is enabled without existing credentials.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMES_WEBUI_PASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options and POST /api/auth/passkey/register endpoints are accessible without authentication, allowing attackers to claim the first passkey and gain permanent administrative control.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Hermes WebUI \u003c 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass","id":"CVE-2026-55196","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Hermes WebUI \u003c 0.51.443 - Broken Access Control in /api/session Endpoint","id":"CVE-2026-55197"},"packages":[],"prev":{"headline":"py7zr: Decompression bomb (zip bomb) denial of service via unchecked extraction size","id":"CVE-2026-55195"},"products":["hermes-webui"],"published":"2026-06-17","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["hermes-webui"]},"summary":"Unauthenticated attackers can register passkeys to gain administrative control when passkey support is enabled without existing credentials.","url":"https://insights.sbomify.com/CVE-2026-55196/"}