{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-18638 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-18638 is a medium-severity denial of service vulnerability in Rapid7 Velociraptor, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18638 and fix it if it is affected.\n\nWhat it is: CVE-2026-18638 is a medium-severity denial of service vulnerability in Rapid7 Velociraptor, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-18638 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-2026-18638/ (Markdown: https://insights.sbomify.com/CVE-2026-18638/index.md)","id":"CVE-2026-18638","markdown":"https://insights.sbomify.com/CVE-2026-18638/index.md","name":"CVE-2026-18638","record":{"aliases":["GHSA-79v4-qf48-mh94"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Velociraptor server","requires_auth":"low_privilege","summary":"Authenticated users can crash the Velociraptor server by calling SetPassword with a non-existent username, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"rapid7","cpe":[],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-703","name":"Improper Check or Handling of Exceptional Conditions"},{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Any authenticated Velociraptor user — including one holding only the readerrole — can terminate the entire server process with a single request, by calling SetPassword with a username that does not exist.","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 server crash via the SetPassword API","id":"CVE-2026-18638","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Velociraptor OIDC Authenticator susceptible to email spoofing","id":"CVE-2026-18639"},"packages":[],"prev":{"headline":"Velociraptor VFSGetBuffer API path deny list bypass","id":"CVE-2026-18636"},"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":"partial"},"state":"PUBLISHED","updated":"2026-08-11","vendors":["Rapid7"]},"summary":"Authenticated users can crash the Velociraptor server by calling SetPassword with a non-existent username, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-18638/"}