---
id: CVE-2026-107503
title: >-
  In Eclipse Ditto versions 3.6.0 to 3.8.13 and 3.9.0 to 3.9.7, the Ditto
  Explorer UI loads its complete environment configuration, including the Ditto
  API URI and the OpenID Connect (OIDC) provider settings, from an arbitrary

  cross-origin…
summary: >-
  In Eclipse Ditto versions 3.6.0 to 3.8.13 and 3.9.0 to 3.9.7, the Ditto
  Explorer UI loads its complete environment configuration, including the Ditto
  API URI and the OpenID Connect (OIDC) provider settings, from an arbitrary

  cross-origin…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N'
cwe:
  - CWE-15
  - CWE-346
  - CWE-522
vendor: Eclipse Ditto
product: Ditto Explorer UI
affected:
  - ditto_explorer_ui >= 3.6.0 <= 3.9.7
published: '2026-10-08'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T14:17:15.317'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107503'
references:
  - url: 'https://eclipse.dev/ditto/release_notes_3814.html'
    label: emo@eclipse.org
  - url: 'https://eclipse.dev/ditto/release_notes_398.html'
    label: emo@eclipse.org
  - url: >-
      https://github.com/eclipse-ditto/ditto/commit/71061f0b01df596fad80fb24502eb1e852ea6909
    label: emo@eclipse.org
  - url: >-
      https://github.com/eclipse-ditto/ditto/commit/d4e51ba20e53c73e3b24e64d4aca57f6079d9ca1
    label: emo@eclipse.org
  - url: >-
      https://github.com/eclipse-ditto/ditto/commit/ee65b8cd9b7219401dcac2c25b79adc8cee4a5ba
    label: emo@eclipse.org
  - url: >-
      https://github.com/eclipse-ditto/ditto/security/advisories/GHSA-8767-g5qv-9jcf
    label: emo@eclipse.org
  - url: 'https://gitlab.eclipse.org/security/cve-assignment/-/work_items/380'
    label: emo@eclipse.org
  - url: >-
      https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/1207
    label: emo@eclipse.org
tags:
  - nvd
  - cve.org
epss: 0.00204
epssPercentile: 0.10265
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-08T14:24:20.513382Z'
cvssSource: cna
ingestedAt: '2026-10-08T10:28:25.585Z'
---

## Overview

In Eclipse Ditto versions 3.6.0 to 3.8.13 and 3.9.0 to 3.9.7, the Ditto Explorer UI loads its complete environment configuration, including the Ditto API URI and the OpenID Connect (OIDC) provider settings, from an arbitrary
cross-origin URL supplied in the environmentsURL query parameter. It adopts this configuration without user confirmation and persists it in the browser's localStorage. A crafted link can therefore set an attacker-controlled OIDC
authority with autoSso enabled. The UI then automatically starts a login at the genuine identity provider but exchanges the returned authorization code together with its PKCE code_verifier at an attacker-controlled token
endpoint. This lets the attacker redeem the code for the victim's access and refresh tokens. Alternatively, an attacker-controlled api_uri causes the UI to send the victim's bearer token or Basic credentials to the attacker. Because
the configuration is persisted, later visits to the UI without the crafted link repeat the token theft. In versions 3.9.0 to 3.9.7, the Swagger UI OIDC integration of the Helm chart and the Docker Compose deployment is affected in
the same way, but requires the user to start the login. The issue is fixed in 3.8.14 and 3.9.8.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.