{"answers":{"affected":"4 open source packages ship an affected version, including github.com/filebrowser/filebrowser/v2 and github.com/filebrowser/filebrowser.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54089 exists.","fix":"Change a configuration setting.","what":"CVE-2026-54089 is a critical authentication bypass vulnerability in filebrowser, published on 25 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-2026-54089 and fix it if it is affected.\n\nWhat it is: CVE-2026-54089 is a critical authentication bypass vulnerability in filebrowser, published on 25 Jun 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-2026-54089 exists.\n\nAffected packages and fixed versions:\n- github.com/filebrowser/filebrowser/v2 (Go): affected from 2.0.0-rc.1; no fix listed\n- github.com/filebrowser/filebrowser/v2 (Go): affected from 2.0.0-rc.1 up to 2.63.18; no fix listed\n- github.com/filebrowser/filebrowser/v2 (Go): affected from 2.0.0-rc.1 up to 2.63.18; no fix listed\n- github.com/filebrowser/filebrowser (Go): affected all versions; no fix listed\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-2026-54089/ (Markdown: https://insights.sbomify.com/CVE-2026-54089/index.md)","id":"CVE-2026-54089","markdown":"https://insights.sbomify.com/CVE-2026-54089/index.md","name":"CVE-2026-54089","record":{"aliases":["GHSA-xqp3-jq6g-x3qm","GO-2026-5966"],"analysis":{"component_type":"web_application","fix_type":"configuration_change","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"File Browser","requires_auth":"none","summary":"Attackers can bypass authentication and create accounts by forging proxy headers when proxy authentication is enabled.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"},{"id":"CWE-287","name":"Improper Authentication"}],"description":"File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Starting with 2.0.0-rc.1, when FileBrowser is configured with proxy authentication (auth.method=proxy), any unauthenticated attacker who can reach the server directly can impersonate any user - including admin - by sending a single forged HTTP header. No credentials are required. Additionally, specifying a non-existent username causes the server to automatically create a new user account, providing an account creation primitive with no authorization. This is an already known issue that has been documented in the documentation for several years, but has not been documented as a vulnerability before.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"File Browser: Authentication Bypass via Proxy Auth Header Forgery","id":"CVE-2026-54089","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"File Browser: Command Allowlist Bypass via Shell Metacharacter Injection","id":"CVE-2026-54090"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/filebrowser/filebrowser","purl":"pkg:golang/github.com/filebrowser/filebrowser","source":"GO-2026-5966"},{"ecosystem":"Go","fixed":[],"introduced":["2.0.0-rc.1"],"last_affected":[],"package":"github.com/filebrowser/filebrowser/v2","purl":"pkg:golang/github.com/filebrowser/filebrowser/v2","source":"GO-2026-5966"},{"ecosystem":"Go","fixed":[],"introduced":["2.0.0-rc.1"],"last_affected":["2.63.18"],"package":"github.com/filebrowser/filebrowser/v2","purl":null,"source":"GHSA-xqp3-jq6g-x3qm"},{"ecosystem":"Go","fixed":[],"introduced":["2.0.0-rc.1"],"last_affected":["2.63.18"],"package":"github.com/filebrowser/filebrowser/v2","purl":"pkg:golang/github.com/filebrowser/filebrowser/v2","source":"GHSA-xqp3-jq6g-x3qm"}],"prev":{"headline":"File Browser: Command Injection via Authentication Hook Shell Substitution (Pre-Authentication RCE)","id":"CVE-2026-54088"},"products":["filebrowser"],"published":"2026-06-25","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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-25","vendors":["filebrowser"]},"summary":"Attackers can bypass authentication and create accounts by forging proxy headers when proxy authentication is enabled.","url":"https://insights.sbomify.com/CVE-2026-54089/"}