{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-105639 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-105639 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-105639 is a critical vulnerability in makeplane plane, published on 5 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-105639 and fix it if it is affected.\n\nWhat it is: CVE-2026-105639 is a critical vulnerability in makeplane plane, published on 5 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-105639 in the wild and no public exploit code.\n\nAffected product: makeplane plane. 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-2026-105639/ (Markdown: https://insights.sbomify.com/CVE-2026-105639/index.md)","id":"CVE-2026-105639","markdown":"https://insights.sbomify.com/CVE-2026-105639/index.md","name":"CVE-2026-105639","record":{"aliases":["GHSA-4vj8-p63v-8p24"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"},{"id":"CWE-287","name":"Improper Authentication"},{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"Plane is an open-source project management tool. Prior to 1.4.0, Plane's signup flow creates a logged-in User row for any submitted email without an out-of-band ownership check, while User.email is unique=True. The authenticated user can call GET /api/users/me/workspaces/invitations/, which returns each WorkspaceMemberInvite whose email matches request.user.email. WorkSpaceMemberInviteSerializer uses fields = \"all\", exposing the token that protects the invitation join endpoint. An unauthenticated attacker who knows a target's email can register an account using that address, enumerate pending invitations, and accept an invitation as the target, joining a workspace at the invited role. The term pre-auth describes the attacker's initial state: the attacker has no credential before signup, while the enumeration and join requests use the session created by that signup. This issue is fixed in 1.4.0.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Plane: Pre-auth workspace invitation hijack via email-squat and self-served invitation token leak in Plane","id":"CVE-2026-105639","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Plane: Account Takeover via Unverified OAuth Email Match (Gitea, self-managed GitLab)","id":"CVE-2026-105640"},"packages":[],"prev":{"headline":"Plane: Magic-code verifier endpoint has no rate limit, enabling 6-digit OTP brute force","id":"CVE-2026-105638"},"products":["plane"],"published":"2026-10-05","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-06","vendors":["makeplane"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-105639/"}