BerriAI litellm up to 1.83.9 /user/update authorization

Summaryinfo

A vulnerability was found in BerriAI litellm up to 1.83.9. It has been rated as critical. The affected element is an unknown function of the file /user/update. Performing a manipulation results in authorization. This vulnerability is known as CVE-2026-47102. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in BerriAI litellm up to 1.83.9. This affects an unknown function of the file /user/update. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published by Fenix Qiao. The advisory is shared at gist.github.com. This vulnerability is uniquely identified as CVE-2026-47102 since 05/18/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available.

Upgrading to version 1.83.10 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 128d32d2494b759c5d15da3452452af4c6a34c01 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1647). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Open Source LiteLLM

Productinfo

Vendor

• BerriAI

Name

• litellm

Version

• 1.83.0
• 1.83.1
• 1.83.2
• 1.83.3
• 1.83.4
• 1.83.5
• 1.83.6
• 1.83.7
• 1.83.8
• 1.83.9

License

• open-source

Website

• Product: https://github.com/BerriAI/litellm/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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