{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-109373 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-109373 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-109373 is a critical authentication bypass vulnerability in zitadel, published on 12 Oct 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-2026-109373 and fix it if it is affected.\n\nWhat it is: CVE-2026-109373 is a critical authentication bypass vulnerability in zitadel, published on 12 Oct 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-2026-109373 in the wild and no public exploit code.\n\nAffected product: zitadel. 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-2026-109373/ (Markdown: https://insights.sbomify.com/CVE-2026-109373/index.md)","id":"CVE-2026-109373","markdown":"https://insights.sbomify.com/CVE-2026-109373/index.md","name":"CVE-2026-109373","record":{"aliases":["GHSA-ff7c-8692-c559","GHSA-jh92-5mrj-p2w2"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Identity and Access Management","requires_auth":"none","summary":"Attackers can take over user accounts, including administrators, by forging unsigned session cookies in the Login V2 UI.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-441","name":"Unintended Proxy or Intermediary"}],"description":"ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them with empty tokens to receive rotated tokens, taking over accounts including MFA-completed administrator sessions.","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":"ZITADEL 3.0.0 before 4.19.2 Account Takeover via Unsigned Login V2 Session Cookie","id":"CVE-2026-109373","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"ZITADEL 3.0.0 before 4.19.2 Privilege Escalation via OIDC Token Exchange Impersonation","id":"CVE-2026-109374"},"packages":[],"prev":{"headline":"ZITADEL 3.0.0 before 4.19.2 Account Takeover via SAML Identity-Provider Confusion","id":"CVE-2026-109372"},"products":["zitadel"],"published":"2026-10-12","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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-13","vendors":["zitadel"]},"summary":"Attackers can take over user accounts, including administrators, by forging unsigned session cookies in the Login V2 UI.","url":"https://insights.sbomify.com/CVE-2026-109373/"}