{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18639 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-18639 is a high-severity authentication bypass vulnerability in Rapid7 Velociraptor, published on 11 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-18639 and fix it if it is affected.\n\nWhat it is: CVE-2026-18639 is a high-severity authentication bypass vulnerability in Rapid7 Velociraptor, published on 11 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-18639 in the wild and no public exploit code.\n\nAffected product: Rapid7 Velociraptor. 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-2026-18639/ (Markdown: https://insights.sbomify.com/CVE-2026-18639/index.md)","id":"CVE-2026-18639","markdown":"https://insights.sbomify.com/CVE-2026-18639/index.md","name":"CVE-2026-18639","record":{"aliases":["GHSA-7v2v-mhwj-r9rw"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":true,"product_category":"Velociraptor server","requires_auth":"low_privilege","summary":"Attackers can impersonate users and take over accounts by spoofing email claims in OIDC authentication if the IdP does not verify emails.","user_interaction":"required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"rapid7","cpe":[],"cvss":{"score":7.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-290","name":"Authentication Bypass by Spoofing"}],"description":"When Velociraptor is configured to use an OIDC IdP for authentication, it uses the email claim as a username. However, some IdP allow users to change the email claim without verification. Some IdPs do not set the \"email_verified\" claim and do not actually verify the email.\n\nThis allows a user to impersonate another user by setting their email address within the IdP, allowing account takeover.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Velociraptor OIDC Authenticator susceptible to email spoofing","id":"CVE-2026-18639","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Velociraptor directory traversal via the NewNotebook API","id":"CVE-2026-18640"},"packages":[],"prev":{"headline":"Velociraptor server crash via the SetPassword API","id":"CVE-2026-18638"},"products":["Velociraptor"],"published":"2026-08-11","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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-11","vendors":["Rapid7"]},"summary":"Attackers can impersonate users and take over accounts by spoofing email claims in OIDC authentication if the IdP does not verify emails.","url":"https://insights.sbomify.com/CVE-2026-18639/"}