{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-39912 exists.","fix":"No fix has been published for CVE-2026-39912 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-39912 is a critical vulnerability in cedar2025 Xboard, published on 9 Apr 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-2026-39912 and fix it if it is affected.\n\nWhat it is: CVE-2026-39912 is a critical vulnerability in cedar2025 Xboard, published on 9 Apr 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-2026-39912 exists.\n\nAffected product: cedar2025 Xboard. 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-2026-39912/ (Markdown: https://insights.sbomify.com/CVE-2026-39912/index.md)","id":"CVE-2026-39912","markdown":"https://insights.sbomify.com/CVE-2026-39912/index.md","name":"CVE-2026-39912","record":{"aliases":["GHSA-83h9-46h8-whf4"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["account_takeover","privilege_escalation"],"network_reachable":"yes","non_default_config":true,"product_category":"V2Board/Xboard panel","requires_auth":"none","summary":"Attackers can obtain authentication tokens via the loginWithMailLink endpoint to gain full account access, including admin privileges, when mail link login is enabled.","user_interaction":"not_required","vuln_class":"information_disclosure"},"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-201","name":"Insertion of Sensitive Information Into Sent Data"}],"description":"V2Board 1.6.1 through 1.7.4 and Xboard through 0.1.9 expose authentication tokens in HTTP response bodies of the loginWithMailLink endpoint when the login_with_mail_link_enable feature is active. Unauthenticated attackers can POST to the loginWithMailLink endpoint with a known email address to receive the full authentication URL in the response, then exchange the token at the token2Login endpoint to obtain a valid bearer token with complete account access including admin privileges.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-04-09","github_poc":1,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-04-09T18:34:39Z","kind":"github_poc","ref":"https://github.com/Chocapikk/CVE-2026-39912","stars":2,"title":"Xboard / V2Board Unauth Account Takeover - Magic Link Token Leak (CVE-2026-39912)"}],"tier":"weaponised"},"has_fix":false,"headline":"v2board / Xboard Authentication Token Exposure via loginWithMailLink","id":"CVE-2026-39912","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"TIM Flow \u003c 26.0.6 Unauthorized SQL Query Execution via Dashboard Export Endpoint","id":"CVE-2026-39914"},"packages":[],"prev":{"headline":"Hashgraph Guardian 3.5.1 Unsandboxed JavaScript Execution RCE","id":"CVE-2026-39911"},"products":["Xboard","v2board"],"published":"2026-04-09","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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-14","vendors":["cedar2025","v2board"]},"summary":"Attackers can obtain authentication tokens via the loginWithMailLink endpoint to gain full account access, including admin privileges, when mail link login is enabled.","url":"https://insights.sbomify.com/CVE-2026-39912/"}