Privilege Escalation in Steeltoe.Management.Endpoint (CVE-2026-50201)
Summary
Vulnerability in Steeltoe.Management.Endpoint (CVE-2026-50201). Confidential information can be exposed externally. Exploitable via EndpointPermissions.Restricted. Mitigation: upgrade to 4.2.0 or later.
Original description
The description as published by the source.
Summary
All Steeltoe actuator endpoints default to EndpointPermissions.Restricted, which is mapped to Cloud Foundry's read_basic_data permission (granted to Space Auditors and similar low-trust roles). Sensitive actuators including heap dump, environment, and thread dump do not raise this to EndpointPermissions.Full, so CF's read_sensitive_data permission flag is not enforced for those endpoints. Spring Boot's equivalent Cloud Foundry integration gates these endpoints with read_sensitive_data by default.
Impact
Any CF user holding Space Auditor, Space Manager, or Org Auditor role can access the heap dump, environment, and thread dump actuators for any Steeltoe application in their space. A heap dump contains all in-memory data including database passwords, bearer tokens, and VCAP_SERVICES credentials. CF's read_sensitive_data permission, which is specifically designed to gate this access, has no effect.
Affected configuration
- Application is deployed on Cloud Foundry with CF actuator and security middleware active (added automatically by
AddAllActuators()when a CF environment is detected). - The attacker holds a CF role that grants
read_basic_data: Space Auditor, Space Manager, or Org Auditor.
Mitigations
If an immediate upgrade is not possible:
- Explicitly set
RequiredPermissions = EndpointPermissions.Fullin the options forHeapDumpEndpointOptions,EnvironmentEndpointOptions, andThreadDumpEndpointOptions. - If heap dump, t…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-50201 has been found in Steeltoe.Management.Endpoint.
Attackers can target a specific entry point like EndpointPermissions.Restricted over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 6.5/10.
What to do: upgrade Steeltoe.Management.Endpoint to 4.2.0 or later.
If unsure, ask your IT team or search "Steeltoe.Management.Endpoint CVE-2026-50201" on the vendor's site.
CVE-2026-50201 (Steeltoe.Management.Endpoint) — CWE-269 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: EndpointPermissions.Restricted / read_basic_data / EndpointPermissions.Full / read_sensitive_data
Patched: 4.2.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-269) exists in Steeltoe.Management.Endpoint. Attackers reach the vulnerable code path via EndpointPermissions.Restricted.
Check the vendor advisory for the affected versions of Steeltoe.Management.Endpoint. Attack surface: EndpointPermissions.Restricted / read_basic_data / EndpointPermissions.Full / read_sensitive_data.
Severity: Medium (CVSS 6.5/10). Confidential information can be exposed externally.
Update to 4.2.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Steeltoe.Management.Endpoint' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Steeltoe.Management.Endpoint' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Steeltoe.Management.Endpointを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade Steeltoe.Management.Endpoint to 4.2.0ステージング環境で 4.2.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com