---
id: "CVE-2025-10149"
kind: "vulnerability"
aliases: ["CVE-2025-10149"]
title: "SCIM endpoint lets federated users act on same-named local accounts"
severity: "high"
cvss: 8.2
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["federation", "other", "scim", "self-hosted"]
not_affected_if: ["no-federated-login", "scim-disabled"]
published_at: "2026-10-19T17:16:59+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T03:04:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-10149", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# SCIM endpoint lets federated users act on same-named local accounts

When a local user and a federated user share a username, the SCIM 2.0 and SCIM 1.1 endpoints fail to check that a federated user is allowed to touch the local account. An authenticated federated user can therefore run arbitrary operations on local accounts, which can lead to account takeover.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-10149

## From the sources

The SCIM endpoint does not sufficiently validate authorization for federated users when performing operations against the local user store. This occurs when a local and a federated user share the same username, allowing a federated user to perform actions intended for a local user, including arbitrary operations.

A malicious actor authenticated as a federated user may perform arbitrary operations on local user accounts via the SCIM 2.0 or SCIM 1.1 endpoints when local and federated users share the same username. This could lead to user account takeover. Deployments that do not support user self-registration are considered medium severity.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_