CVE-2026-18918
- Source
- https://cve.org/CVERecord?id=CVE-2026-18918
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18918.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-18918
- Published
- 2026-08-28T08:54:07.990Z
- Modified
- 2026-09-01T03:30:51.250436144Z
- Severity
-
- 9.1 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/AU:Y/R:U/V:C/RE:L/U:Red CVSS Calculator
- Summary
- OAuth 1.0 session-fixation chain via unauthenticated provisional-consumer registration and insecure v1_0Allowed default
- Details
-
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. - Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18918.json", "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "2.0.0" }, { "fixed": "7.0.0" } ] } ], "cna_assigner": "eclipse", "cwe_ids": [ "CWE-863" ] }- References
-
- https://github.com/eclipse-lyo/lyo/releases/tag/v6.0.1.Final
- https://github.com/eclipse-lyo/lyo/releases/tag/v7.0.0.Beta3
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/221
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18918.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-18918