{"answers":{"affected":"3 open source packages ship an affected version, including github.com/zitadel/zitadel.","exploited":"There is no known exploitation of CVE-2026-85056 in the wild and no public exploit code.","fix":"Upgrade github.com/zitadel/zitadel to 1.80.0-v2.20.0.20260717062356-56f4798ed31f or later.","what":"CVE-2026-85056 is a high-severity authentication bypass vulnerability in zitadel, published on 24 Sep 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-2026-85056 and fix it if it is affected.\n\nWhat it is: CVE-2026-85056 is a high-severity authentication bypass vulnerability in zitadel, published on 24 Sep 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-2026-85056 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/zitadel/zitadel (Go): affected all versions; fixed in 1.80.0-v2.20.0.20260717062356-56f4798ed31f\n- github.com/zitadel/zitadel (Go): affected all versions; fixed in 1.80.0-v2.20.0.20260717062356-56f4798ed31f\n- github.com/zitadel/zitadel (Go): affected all versions; fixed in 1.80.0-v2.20.0.20260717062356-56f4798ed31f\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-2026-85056/ (Markdown: https://insights.sbomify.com/CVE-2026-85056/index.md)","id":"CVE-2026-85056","markdown":"https://insights.sbomify.com/CVE-2026-85056/index.md","name":"CVE-2026-85056","record":{"aliases":["GHSA-9993-rfwp-rhwf","GO-2026-6589"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Identity management platform","requires_auth":"none","summary":"Attackers can bypass MFA in ZITADEL Login V2 by reusing sessions, allowing unauthorized access to customer applications via OIDC or SAML callbacks.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"ZITADEL is an open source identity management platform. From 4.0.0 until 4.16.1, ZITADEL Login V2 creates a browser session after password verification and can reuse that session for a later authentication request without verifying a user's enrolled TOTP, OTP, or U2F second factor. When the MFA step is abandoned and login starts again, session-validity checks require MFA only when the organization enables Force MFA or Force MFA for local users only, so a voluntarily enrolled factor can be skipped while completing an OIDC or SAML callback for a customer application. Login V1, the ZITADEL Console, Management and Admin APIs, and user self-management are not affected. This issue is fixed in version 4.16.1.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ZITADEL: MFA bypass via session reuse in Login V2","id":"CVE-2026-85056","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"ZITADEL: Actions V1 sandbox escape: host file read via require()","id":"CVE-2026-85057"},"packages":[{"ecosystem":"Go","fixed":["1.80.0-v2.20.0.20260717062356-56f4798ed31f"],"introduced":["0"],"last_affected":[],"package":"github.com/zitadel/zitadel","purl":null,"source":"GHSA-9993-rfwp-rhwf"},{"ecosystem":"Go","fixed":["1.80.0-v2.20.0.20260717062356-56f4798ed31f"],"introduced":["0"],"last_affected":[],"package":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","source":"GHSA-9993-rfwp-rhwf"},{"ecosystem":"Go","fixed":["1.80.0-v2.20.0.20260717062356-56f4798ed31f"],"introduced":["0"],"last_affected":[],"package":"github.com/zitadel/zitadel","purl":"pkg:golang/github.com/zitadel/zitadel","source":"GO-2026-6589"}],"prev":{"headline":"Twenty: Field-level read bypass","id":"CVE-2026-85055"},"products":["zitadel"],"published":"2026-09-24","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-09-28","vendors":["zitadel"]},"summary":"Attackers can bypass MFA in ZITADEL Login V2 by reusing sessions, allowing unauthorized access to customer applications via OIDC or SAML callbacks.","url":"https://insights.sbomify.com/CVE-2026-85056/"}