Codecentric - CraftedSignal Threat Feedhttps://feed.craftedsignal.io/vendors/codecentric/Trending threats, MITRE ATT&CK coverage, and detection metadata. Fed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioMon, 13 Jul 2026 22:32:13 +0000Spring Boot Admin Server SSRF Vulnerability (CVE-2026-62242)https://feed.craftedsignal.io/briefs/2026-07-spring-boot-admin-ssrf/Mon, 13 Jul 2026 22:32:13 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-07-spring-boot-admin-ssrf/An unauthenticated attacker can exploit CVE-2026-62242, a server-side request forgery vulnerability in Spring Boot Admin Server before 4.1.2, to force the server to make requests to arbitrary internal addresses and exfiltrate sensitive data, including cloud credentials.Spring Boot Admin Server versions prior to 4.1.2 are affected by CVE-2026-62242, a critical server-side request forgery (SSRF) vulnerability. This flaw allows an unauthenticated attacker to register new instances on the server by providing attacker-controlled healthUrl and managementUrl parameters. Crucially, the server fails to validate these URLs against private IP ranges or cloud metadata endpoints. This lack of validation enables the attacker to coerce the Spring Boot Admin Server into initiating HTTP requests to arbitrary internal network addresses or sensitive cloud metadata services. Subsequently, the attacker can leverage the server's actuator proxy functionality to retrieve the response bodies from these internal requests, leading to the potential exfiltration of sensitive information, such as cloud credentials.

Attack Chain

  1. An unauthenticated attacker sends a crafted registration request to the vulnerable Spring Boot Admin Server.
  2. The registration request includes malicious healthUrl and managementUrl parameters, pointing to internal network IP addresses or cloud metadata endpoints (e.g., 169.254.169.254).
  3. The Spring Boot Admin Server, due to the SSRF vulnerability (CVE-2026-62242), processes these unvalidated URLs without restricting access to private resources.
  4. The server then initiates HTTP GET requests to the internal arbitrary addresses or cloud metadata endpoints specified by the attacker.
  5. The server's actuator proxy component retrieves the response bodies from these internal requests, which may contain sensitive data.
  6. The attacker then accesses the Spring Boot Admin Server's functionality to retrieve the proxied response bodies, effectively exfiltrating the internal data, such as cloud credentials.

Impact

Successful exploitation of CVE-2026-62242 grants unauthenticated attackers the ability to perform server-side request forgery, bypassing network segmentation and accessing internal resources. This can lead to sensitive information disclosure, particularly the exfiltration of cloud credentials from metadata endpoints. Compromised cloud credentials can enable further lateral movement within cloud environments, leading to unauthorized access to cloud resources, data manipulation, or complete compromise of cloud accounts, posing a significant risk to the integrity and confidentiality of an organization's cloud infrastructure.

Recommendation

  • Patch Spring Boot Admin Server instances immediately to version 4.1.2 or later to mitigate CVE-2026-62242.
  • Monitor web server logs for unauthenticated registration attempts that include healthUrl or managementUrl parameters pointing to internal IP addresses or cloud metadata endpoints.
  • Ensure network segmentation and firewall rules are in place to restrict outbound connections from Spring Boot Admin Server instances to internal networks and sensitive services.
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