CVE-2026-84736 in aeriOS
Summary
by MITRE • 09/03/2026
In the current development version of Eclipse aeriOS, for which no official release has yet been published, the Federator component disables TLS certificate validation for outbound HTTPS connections by default. When the TLS_CERTIFICATE_VALIDATION environment variable is unset or set to false, the component configures its HTTP transport to skip TLS certificate verification.
As a result, an attacker able to intercept network communications between the Federator and external services could impersonate those services and intercept sensitive information transmitted over HTTPS, including OAuth client credentials and bearer tokens.
The issue has been addressed by enabling TLS certificate validation by default. The TLS_CERTIFICATE_VALIDATION environment variable is now set to true in the default configuration provided by the Helm chart and Docker Compose deployment.
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Analysis
by VulDB Data Team • 09/03/2026
A critical security misconfiguration was identified within the Federator component of Eclipse aeriOS, specifically affecting development versions prior to an official stable release. The vulnerability stems from the application's handling of Transport Layer Security (TLS) certificate validation for outbound HTTPS connections. By default, when the TLS_CERTIFICATE_VALIDATION environment variable is either unset or explicitly set to false, the HTTP transport layer configured by the Federator disables strict verification of server certificates. This configuration effectively allows the client to accept any valid-looking SSL/TLS certificate presented by a remote service without verifying its authenticity against trusted Certificate Authorities or checking for hostname mismatches and expiration dates.
The operational impact of this flaw is severe, as it creates a significant window for Man-in-the-Middle (MitM) attacks. An attacker positioned within the network path between the Federator and external services can intercept, decrypt, and potentially modify communications that are ostensibly protected by HTTPS encryption. Because certificate validation is bypassed, the attacker can present a self-signed or forged certificate to impersonate legitimate backend services. This capability allows for the interception of highly sensitive data transmitted during authentication and authorization processes, including OAuth client credentials, refresh tokens, and bearer access tokens. The compromise of these credentials could lead to unauthorized access to protected resources, identity theft, and further lateral movement within the associated ecosystem.
This vulnerability aligns with CWE-295 Improper Certificate Validation, which describes scenarios where a software does not validate or incorrectly validates an X.509 certificate against its expected CA chain or hostname. From a threat modeling perspective using the MITRE ATT&CK framework, this flaw facilitates techniques such as Credential Access via Network Sniffing and potentially Impersonation within the context of cloud-based services. The lack of default secure configuration represents a failure in implementing security by design principles, where developers inadvertently prioritize ease of testing or development over production-grade security defaults.
The issue has been remediated by enforcing TLS certificate validation as the mandatory default behavior for all outbound HTTPS connections initiated by the Federator component. In the updated deployment configurations provided via Helm charts and Docker Compose files, the TLS_CERTIFICATE_VALIDATION environment variable is now set to true by default. This change ensures that clients will strictly verify server certificates against trusted roots before establishing a secure channel. To maintain security posture, organizations using this software should ensure they are running patched versions or manually setting the validation flag to true in their custom deployment configurations if upgrading is not immediately feasible. Additionally, administrators should audit network traffic logs for any signs of certificate anomalies during transition periods and consider implementing Certificate Pinning for critical external dependencies where applicable to further mitigate risks associated with compromised Certificate Authorities.