{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/steeltoe/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-50200"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Steeltoe.Management.Endpoint \u003c= 4.1.0","Steeltoe.Management.EndpointCore \u003c= 3.3.0"],"_cs_severities":["high"],"_cs_tags":["credential-access","vulnerability",".net","steeltoe","webserver","actuator"],"_cs_type":"advisory","_cs_vendors":["Steeltoe"],"content_html":"\u003cp\u003eA significant vulnerability, identified as CVE-2026-50200, affects the \u003ccode\u003eSanitizer\u003c/code\u003e component within the Environment actuator of Steeltoe applications, specifically \u003ccode\u003eSteeltoe.Management.Endpoint\u003c/code\u003e versions \u003ccode\u003e\u0026lt;= 4.1.0\u003c/code\u003e and \u003ccode\u003eSteeltoe.Management.EndpointCore\u003c/code\u003e versions \u003ccode\u003e\u0026lt;= 3.3.0\u003c/code\u003e. This flaw allows sensitive connection string details, including embedded plaintext passwords and user credentials, to be exposed verbatim when the \u003ccode\u003e/actuator/env\u003c/code\u003e endpoint is accessed. The default sanitization rules fail to cover standard .NET \u003ccode\u003eConnectionStrings:\u0026lt;name\u0026gt;\u003c/code\u003e or Steeltoe Connectors' \u003ccode\u003eSteeltoe:Client:\u0026lt;type\u0026gt;:Default:ConnectionString\u003c/code\u003e patterns. This means that if \u003ccode\u003eenv\u003c/code\u003e is exposed in \u003ccode\u003eManagement:Endpoints:Actuator:Exposure:Include\u003c/code\u003e on standard deployments, or if accessed by an authenticated Cloud Foundry user with \u003ccode\u003eread_basic_data\u003c/code\u003e permissions via \u003ccode\u003e/cloudfoundryapplication/env\u003c/code\u003e, an attacker can retrieve critical database credentials, leading to direct access to backend databases and circumventing application-level security controls.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker conducts reconnaissance to identify a publicly accessible or internally exposed Steeltoe application endpoint, specifically targeting \u003ccode\u003e/actuator/env\u003c/code\u003e or \u003ccode\u003e/cloudfoundryapplication/env\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe attacker sends an unauthenticated (if publicly exposed) or authenticated (if Cloud Foundry with \u003ccode\u003eread_basic_data\u003c/code\u003e permissions) HTTP GET request to the identified \u003ccode\u003e/actuator/env\u003c/code\u003e or \u003ccode\u003e/cloudfoundryapplication/env\u003c/code\u003e endpoint.\u003c/li\u003e\n\u003cli\u003eThe Steeltoe application's Environment actuator processes the request to display environment properties.\u003c/li\u003e\n\u003cli\u003eDue to the flaw in the \u003ccode\u003eSanitizer\u003c/code\u003e component (CVE-2026-50200), configuration keys such as \u003ccode\u003eConnectionStrings:\u0026lt;name\u0026gt;\u003c/code\u003e or \u003ccode\u003e*:ConnectionString\u003c/code\u003e are not properly redacted.\u003c/li\u003e\n\u003cli\u003eThe application returns the full, unsanitized connection string values, which include plaintext credentials like \u003ccode\u003ePassword=\u003c/code\u003e or \u003ccode\u003euser:pass@host\u003c/code\u003e, in the HTTP response body.\u003c/li\u003e\n\u003cli\u003eThe attacker extracts these sensitive database credentials from the response.\u003c/li\u003e\n\u003cli\u003eUsing the obtained credentials, the attacker establishes a direct connection to the backend database.\u003c/li\u003e\n\u003cli\u003eThe attacker can then perform data exfiltration, manipulation, or further persistence actions on the database, bypassing the application layer.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eOrganizations running vulnerable Steeltoe applications are at high risk of credential compromise and direct database access. If successfully exploited, this vulnerability allows attackers to retrieve plaintext database credentials from the \u003ccode\u003e/actuator/env\u003c/code\u003e endpoint. This direct access to databases, such as SQL Server, PostgreSQL, or MySQL, can lead to severe consequences including unauthorized data exfiltration, data tampering, service disruption, and potential lateral movement within the network. The scope of impact is broad, affecting any organization utilizing Steeltoe where the actuator environment endpoint is exposed, either intentionally or inadvertently, without proper sanitization or authorization.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately upgrade \u003ccode\u003enuget/Steeltoe.Management.Endpoint\u003c/code\u003e to version \u003ccode\u003e4.1.1\u003c/code\u003e or later, and \u003ccode\u003enuget/Steeltoe.Management.EndpointCore\u003c/code\u003e to version \u003ccode\u003e3.3.1\u003c/code\u003e or later, to patch CVE-2026-50200.\u003c/li\u003e\n\u003cli\u003eIf immediate upgrade is not possible, remove \u003ccode\u003eenv\u003c/code\u003e from \u003ccode\u003eManagement:Endpoints:Actuator:Exposure:Include\u003c/code\u003e in your application configuration to prevent access via the standard path.\u003c/li\u003e\n\u003cli\u003eAs a defense-in-depth measure, add \u003ccode\u003e.*connectionstring.*\u003c/code\u003e to the \u003ccode\u003eKeysToSanitize\u003c/code\u003e list in your Steeltoe configuration to ensure these patterns are redacted.\u003c/li\u003e\n\u003cli\u003eEnforce strong authorization on all actuator endpoints to limit access to trusted personnel and systems, as described in the brief's attack chain.\u003c/li\u003e\n\u003cli\u003eDeploy the \u003ccode\u003eDetects CVE-2026-50200 Exploitation - Access to Steeltoe /actuator/env\u003c/code\u003e Sigma rule to your SIEM and tune for legitimate access patterns.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-03T11:22:21Z","date_published":"2026-07-03T11:22:21Z","id":"https://feed.craftedsignal.io/briefs/2026-07-steeltoe-env-sanitizer-leak/","summary":"A high-severity vulnerability, CVE-2026-50200, in the Steeltoe `Sanitizer` component of the Environment actuator allows for the unintended disclosure of sensitive connection string values, including embedded plaintext credentials, when the `/actuator/env` endpoint is accessed, enabling direct database connection and bypassing application-tier security.","title":"Steeltoe Environment Actuator Vulnerability (CVE-2026-50200) Leaks Database Passwords","url":"https://feed.craftedsignal.io/briefs/2026-07-steeltoe-env-sanitizer-leak/"}],"language":"en","title":"CraftedSignal Threat Feed - Steeltoe","version":"https://jsonfeed.org/version/1.1"}