{"answers":{"affected":"3 open source packages ship an affected version, including open-webui. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-87016 exists.","fix":"Upgrade open-webui to 0.11.1 or later.","what":"CVE-2026-87016 is a high-severity authentication bypass vulnerability in Openwebui Open Webui, published on 9 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-2026-87016 and fix it if it is affected.\n\nWhat it is: CVE-2026-87016 is a high-severity authentication bypass vulnerability in Openwebui Open Webui, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-87016 exists.\n\nAffected packages and fixed versions:\n- open-webui (PyPI): affected from 0.6.41; fixed in 0.11.1\n- open-webui (PyPI): affected from 0.6.41; fixed in 0.11.1\n- open-webui (PyPI): affected from 0.6.41; fixed in 0.11.1\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-2026-87016/ (Markdown: https://insights.sbomify.com/CVE-2026-87016/index.md)","id":"CVE-2026-87016","markdown":"https://insights.sbomify.com/CVE-2026-87016/index.md","name":"CVE-2026-87016","record":{"aliases":["GHSA-wpmr-8h3q-fwj7","PYSEC-2026-4128"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Open WebUI AI platform","requires_auth":"none","summary":"Attackers can impersonate other users, including administrators, by exploiting wildcard characters in OAuth subject claims on SQLite deployments.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"open_webui","vendor":"openwebui"}],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"},{"id":"CWE-155","name":"Improper Neutralization of Wildcards or Matching Symbols"}],"description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.41 until 0.11.1, get_user_by_oauth_sub and get_user_by_scim_external_id in backend/open_webui/models/users.py used JSON contains matching that compiled to SQL LIKE substring matching on SQLite. An OAuth subject containing percent or underscore wildcard characters could resolve to a different stored identity, potentially selecting an administrator account and issuing the attacker that account's session; PostgreSQL deployments were not affected. This issue is fixed in version 0.11.1.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Open WebUI: Sign-in as another user via wildcard characters in the OAuth subject claim on SQLite","id":"CVE-2026-87016","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":"openwebui:open_webui","products":["openwebui:open_webui"],"type":"auth_bypass","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"Open WebUI: Inaccessible knowledge bases are exposed through the built-in knowledge tool on most vector backends","id":"CVE-2026-87017"},"packages":[{"ecosystem":"PyPI","fixed":["0.11.1"],"introduced":["0.6.41"],"last_affected":[],"package":"open-webui","purl":null,"source":"GHSA-wpmr-8h3q-fwj7"},{"ecosystem":"PyPI","fixed":["0.11.1"],"introduced":["0.6.41"],"last_affected":[],"package":"open-webui","purl":"pkg:pypi/open-webui","source":"GHSA-wpmr-8h3q-fwj7"},{"ecosystem":"PyPI","fixed":["0.11.1"],"introduced":["0.6.41"],"last_affected":[],"package":"open-webui","purl":"pkg:pypi/open-webui","source":"PYSEC-2026-4128"}],"prev":{"headline":"Open WebUI: A user's session cookies are sent to tool servers configured for bearer authentication","id":"CVE-2026-87015"},"products":["open-webui"],"published":"2026-09-09","related":[{"cvss_score":9.1,"headline":"Open WebUI: LDAP Empty Password Authentication Bypass","id":"CVE-2026-44551","kev_date_added":null,"published":"2026-05-15"},{"cvss_score":9,"headline":"open-webui - Remote Code Execution via CORS Misconfiguration and Session Validation","id":"CVE-2026-56400","kev_date_added":null,"published":"2026-07-15"},{"cvss_score":9,"headline":"Cross-site Scripting (XSS) in open-webui/open-webui","id":"CVE-2024-8017","kev_date_added":null,"published":"2025-03-20"},{"cvss_score":8.8,"headline":"Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed","id":"CVE-2026-45672","kev_date_added":null,"published":"2026-05-15"},{"cvss_score":8.7,"headline":"Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin","id":"CVE-2026-87995","kev_date_added":null,"published":"2026-09-09"},{"cvss_score":8.7,"headline":"Open WebUI: Stored XSS via unescaped KaTeX render-error fallback in rendered messages","id":"CVE-2026-70492","kev_date_added":null,"published":"2026-08-04"},{"cvss_score":8.7,"headline":"Open WebUI: Stored XSS in Mermaid Markdown Preview","id":"CVE-2026-54011","kev_date_added":null,"published":"2026-06-23"}],"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":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-14","vendors":["open-webui"]},"summary":"Attackers can impersonate other users, including administrators, by exploiting wildcard characters in OAuth subject claims on SQLite deployments.","url":"https://insights.sbomify.com/CVE-2026-87016/"}