Auth bypass in Berriai Litellm
CVE-2026-47102
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (56.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.002
Affected products
- Berriai Litellm — versions 0
- Litellm
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gist.github.com/13ph03nix/9ec616e1fdc77b3673509c60206e827f (Exploit, technical-description, Third Party Advisory, exploit, Mitigation)
- huntr.com/bounties/8e75edfb-ff05-4e63-bfca-2d93d03fb3b9 (Exploit, Third Party Advisory, exploit, third-party-advisory)
- github.com/BerriAI/litellm/releases/tag/v1.83.10-stable (release-notes, Release Notes)
- github.com/BerriAI/litellm/pull/25541 (issue-tracking, Patch, Issue Tracking)
- github.com/BerriAI/litellm/commit/e6f18ce75b111c9b93dc15c72894cbdeb53177ce (Patch, patch)
- github.com/BerriAI/litellm/commit/128d32d2494b759c5d15da3452452af4c6a34c01 (Patch, patch)
- www.vulncheck.com/advisories/litellm-privilege-escalation-via-user-update (Third Party Advisory, third-party-advisory)
- www.obsidiansecurity.com/blog/litellm-privilege-escalation-rce (technical-description, exploit)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-47102?
- CVE-2026-47102 is a high-severity vulnerability in Berriai Litellm, classified under Incorrect Authorization. CVSS score: 8.8/10. Published 2026-05-21.
- How severe is CVE-2026-47102?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-47102 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.