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1 vulnerability found for Steeltoe.Security.Authentication.CloudFoundryBase by SteeltoeOSS
CVE-2026-50202 (GCVE-0-2026-50202)
Vulnerability from cvelistv5 – Published: 2026-06-17 21:53 – Updated: 2026-06-18 13:08
VLAI
Title
Steeltoe's static JWKS cache shared across schemes and never invalidated
Summary
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Security.Authentication.CloudFoundryBase prior to version 3.4.0, Steeltoe.Security.Authentication.JwtBearer prior to version 4.2.0, and Steeltoe.Security.Authentication.OpenIdConnect prior to version 4.2.0, the JWT signing key cache in `TokenKeyResolver` uses `kid` as the sole cache key without namespacing by authority. In applications with multiple `JwtBearer` schemes pointing to different identity providers, a key fetched for one scheme can satisfy token validation for another. Additionally, cached keys have no expiration, so rotated or revoked keys remain trusted until the application process restarts. Steeltoe.Security.Authentication.CloudFoundryBase version 3.4.0, Steeltoe.Security.Authentication.JwtBearer version 4.2.0, and Steeltoe.Security.Authentication.OpenIdConnect version 4.2.0 patch the issue. If an immediate upgrade is not possible: In multi-scheme deployments, configure only one `JwtBearer` scheme per application when different identity providers are required; and/or restart the application process after an identity provider signing key rotation to clear stale cached keys.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-668 - Exposure of Resource to Wrong Sphere
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/SteeltoeOSS/security-advisorie… | x_refsource_CONFIRM |
| https://github.com/SteeltoeOSS/Steeltoe/commit/04… | x_refsource_MISC |
| https://github.com/SteeltoeOSS/Steeltoe/commit/17… | x_refsource_MISC |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| SteeltoeOSS | Steeltoe.Security.Authentication.CloudFoundryBase |
Affected:
< 3.4.0
|
|
| SteeltoeOSS | Steeltoe.Security.Authentication.JwtBearer |
Affected:
< 4.2.0
|
|
| SteeltoeOSS | Steeltoe.Security.Authentication.OpenIdConnect |
Affected:
< 4.2.0
|
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