{"id":"CVE-2026-49249","summary":"Boruta: Authenticated atom-exhaustion DoS in BorutaIdentityWeb.UserSettingsController.update/2","details":"Boruta is a standalone authorization server that aims to implement OAuth 2.0 and Openid Connect up to decentralized identity specifications. Prior to version 0.10.0, BorutaIdentityWeb.UserSettingsController.update/2 atomizes every key of the user-supplied request body via String.to_atom/1 before any validation. Because String.to_atom interns atoms permanently in the BEAM atom table (default cap 1,048,576 atoms; ERL_MAX_ATOMS), any authenticated end user can send PUT /users/settings with a user[\u003cfresh-key\u003e]=... body containing fresh keys per request and exhaust the global VM atom table. Once the table is full, the BEAM aborts with no more index entries in atom_tab and the entire OIDC server (auth, admin, gateway apps in the umbrella) crashes. The route is protected only by require_authenticated_user and a per-IP rate limit of 10 requests/second; a logged-in end user can hit it. The keys are atomized unconditionally before the downstream Accounts.update_user/6 call, so even failing updates contribute to exhaustion. This issue has been patched in version 0.10.0.","aliases":["GHSA-q428-ch8m-94gg"],"modified":"2026-09-04T03:47:30.207935853Z","published":"2026-09-02T17:28:32.280Z","database_specific":{"cwe_ids":["CWE-400","CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49249.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/malach-it/boruta-server/releases/tag/0.10.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49249.json"},{"type":"ADVISORY","url":"https://github.com/malach-it/boruta-server/security/advisories/GHSA-q428-ch8m-94gg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49249"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/malach-it/boruta-server","events":[{"introduced":"0"},{"fixed":"6636da08934cd4aea5e19a0147b9e111a6fb3635"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.10.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["0.9.2","0.9.1","0.9.0","0.8.0","0.7.2","0.7.1","0.7.0","0.6.1","0.6.0","0.5.1","0.5.0","0.4.2","0.4.1","0.4.0","0.3.0","0.2.0","0.1.0","Initial"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49249.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}