{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111639 exists.","fix":"No fix has been published for CVE-2026-111639 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-111639 is a high-severity authentication bypass vulnerability in mlogclub bbs-go, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-111639 and fix it if it is affected.\n\nWhat it is: CVE-2026-111639 is a high-severity authentication bypass vulnerability in mlogclub bbs-go, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111639 exists.\n\nAffected product: mlogclub bbs-go. 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-2026-111639/ (Markdown: https://insights.sbomify.com/CVE-2026-111639/index.md)","id":"CVE-2026-111639","markdown":"https://insights.sbomify.com/CVE-2026-111639/index.md","name":"CVE-2026-111639","record":{"aliases":["GHSA-h5hh-rp4r-9p9x"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"bbs-go forum software","requires_auth":"none","summary":"Attackers can hijack user accounts in bbs-go by replaying Google ID tokens due to missing audience validation in the login endpoint.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.6,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"bbs-go through 4.4.6 contains an authentication bypass vulnerability in the /api/login/google_one_tap endpoint that allows remote attackers to log in as other users by submitting Google ID tokens issued to any OAuth client. Attackers operating their own Google OAuth client can capture a victim's Google-signed ID token and replay it, since the aud claim is never checked, to obtain an authenticated session as the victim's Google-linked account.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"bbs-go through 4.4.6 Account Takeover via Google One Tap Login","id":"CVE-2026-111639","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"DooTask through 1.9.66 Missing Authorization in OKR Comment Dialogs","id":"CVE-2026-111640"},"packages":[],"prev":{"headline":"sshportal through 1.19.5 Missing Authorization in 'key show' Command Exposes Private Keys","id":"CVE-2026-111638"},"products":["bbs-go"],"published":"2026-10-16","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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["mlogclub"]},"summary":"Attackers can hijack user accounts in bbs-go by replaying Google ID tokens due to missing audience validation in the login endpoint.","url":"https://insights.sbomify.com/CVE-2026-111639/"}