SpringBlade versions 2.7.3 through 3.5.0 contain a privilege escalation vulnerability that allows authenticated attackers to create system administrator accounts by sending crafted POST requests to an unprotected internal Feign user-creation endpoint exposed via @RestController without authorization checks. Attackers can exploit the gateway's authentication filter, which only validates JWT parsing without verifying user roles or caller identity, and leverage a hardcoded JWT signing key embedded in publicly available JARs to forge tokens and escalate privileges from a low-privilege user to administrator, enabling cross-tenant data pollution and persistent backdoor access.
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Affected Vendors & Products
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History
Fri, 28 Aug 2026 19:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | SpringBlade versions 2.7.3 through 3.5.0 contain a privilege escalation vulnerability that allows authenticated attackers to create system administrator accounts by sending crafted POST requests to an unprotected internal Feign user-creation endpoint exposed via @RestController without authorization checks. Attackers can exploit the gateway's authentication filter, which only validates JWT parsing without verifying user roles or caller identity, and leverage a hardcoded JWT signing key embedded in publicly available JARs to forge tokens and escalate privileges from a low-privilege user to administrator, enabling cross-tenant data pollution and persistent backdoor access. | |
| Title | SpringBlade 2.7.3 < 5.0.0 Privilege Escalation via Exposed Feign Endpoint | |
| Weaknesses | CWE-862 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-28T20:30:10.433Z
Reserved: 2026-06-18T19:15:10.649Z
Link: CVE-2026-56100
No data.
Status : Received
Published: 2026-08-28T20:18:30.640
Modified: 2026-08-28T20:18:30.640
Link: CVE-2026-56100
No data.
OpenCVE Enrichment
Updated: 2026-08-28T21:30:05Z
Weaknesses