🛡️ CVE-2026-50202 — steeltoe.security.authentication.cloudfo

🟡 CVSS 5.9 — Medium ✅ No Known Exploit CWE-668 NVD
5.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2026-50202 is classified as CWE-668: Exposure of Resource to Wrong Sphere. A resource is made reachable from a context that should not have access to it.

Affected software

CVE-2026-50202 is recorded against 4 packages.

  • steeltoe.security.authentication.cloudfoundrybase (fixed in 3.4.0)
  • steeltoe.security.authentication.jwtbearer (fixed in 4.2.0)
  • steeltoe.security.authentication.openidconnect (fixed in 4.2.0)
  • unknown

Timeline and source

Published on 2 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)

Details

Severity Medium
CVSS Score 5.9
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
CWE CWE-668
Public Exploit ✅ No
Source NVD
Published 2026-07-02
Updated 2026-08-12
Modified 2026-07-02
Fix URL N/A

Affected Packages

Software From version Fixed in
steeltoe.security.authentication.cloudfoundrybase — 3.4.0
steeltoe.security.authentication.jwtbearer — 4.2.0
steeltoe.security.authentication.openidconnect — 4.2.0
unknown — —

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