LiteLLM prior to 1.83.10 allows a user to modify their own user_role via the /user/update endpoint. While the endpoint correctly restricts users to updating only their own account, it does not restrict which fields may be changed. A user who can reach this endpoint can set their role to proxy_admin, gaining full administrative access to LiteLLM including all users, teams, keys, models, and prompt history. Users with the org_admin role have legitimate access to this endpoint and can exploit this vulnerability without chaining any additional flaw.
https://huntr.com/bounties/8e75edfb-ff05-4e63-bfca-2d93d03fb3b9
https://gist.github.com/13ph03nix/9ec616e1fdc77b3673509c60206e827f
https://www.vulncheck.com/advisories/litellm-privilege-escalation-via-user-update
https://github.com/BerriAI/litellm/releases/tag/v1.83.10-stable
https://github.com/BerriAI/litellm/pull/25541
https://github.com/BerriAI/litellm/commit/e6f18ce75b111c9b93dc15c72894cbdeb53177ce
https://github.com/BerriAI/litellm/commit/128d32d2494b759c5d15da3452452af4c6a34c01
Published: 2026-05-21
Updated: 2026-05-21
Base Score: 9
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
Severity: High
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity: High
Base Score: 8.7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Severity: High