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Description

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.

PUBLISHED Reserved 2026-05-18 | Published 2026-05-21 | Updated 2026-05-21 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Incorrect Authorization

Product status

Default status
affected

Any version before 1.83.10
affected

Credits

Fenix Qiao (aka 13ph03nix) from Obsidian Security finder

References

gist.github.com/13ph03nix/9ec616e1fdc77b3673509c60206e827f technical-description exploit

huntr.com/bounties/8e75edfb-ff05-4e63-bfca-2d93d03fb3b9 third-party-advisory exploit

github.com/BerriAI/litellm/releases/tag/v1.83.10-stable release-notes

github.com/BerriAI/litellm/pull/25541 issue-tracking

github.com/...ommit/e6f18ce75b111c9b93dc15c72894cbdeb53177ce patch

github.com/...ommit/128d32d2494b759c5d15da3452452af4c6a34c01 patch

www.vulncheck.com/...lm-privilege-escalation-via-user-update third-party-advisory

cve.org (CVE-2026-47102)

nvd.nist.gov (CVE-2026-47102)

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