CVE-2026-18918: CWE-863 in Eclipse Foundation Eclipse Lyo
In Eclipse Lyo versions 2.0.0 to 7.0.0, OAuth server authorization checks can be bypassed when the 2-legged auth is supported by the server. In those cases, application that based their authz filters upon Lyo-provided `AbstractAdapterCredentialsFilter`, are vulnerable. An attacked can create a provisional trusted client (valid use-case) but then it can be used as a trusted client immediately without requiring the administrator approval to clear the provisional status. The 3-legged path requiring user interaction is not vulnerable and rejects provisional clients.
CVE-2026-18918: CWE-863 in Eclipse Foundation Eclipse Lyo
Description
In Eclipse Lyo versions 2.0.0 to 7.0.0, OAuth server authorization checks can be bypassed when the 2-legged auth is supported by the server. In those cases, application that based their authz filters upon Lyo-provided `AbstractAdapterCredentialsFilter`, are vulnerable. An attacked can create a provisional trusted client (valid use-case) but then it can be used as a trusted client immediately without requiring the administrator approval to clear the provisional status. The 3-legged path requiring user interaction is not vulnerable and rejects provisional clients.
CVSS v4.0
Score 9.1critical
Affected software
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-08-05T07:44:04.388Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a916f87acd9273b49cf91b5
Added to database: 08/28/2026, 11:22:47 UTC
Last updated: 08/28/2026, 19:47:12 UTC
Views: 11
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