CVE-2026-30968 in Server
Summary
by MITRE • 03/10/2026
Coral Server is open collaboration infrastructure that enables communication, coordination, trust and payments for The Internet of Agents. Prior to 1.1.0, the SSE endpoint (/sse/v1/...) in Coral Server did not strongly validate that a connecting agent was a legitimate participant in the session. This could theoretically allow unauthorized message injection or observation. This vulnerability is fixed in 1.1.0.
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Analysis
by VulDB Data Team • 03/14/2026
The vulnerability identified as CVE-2026-30968 affects Coral Server version 1.1.0 and earlier, representing a critical security flaw in the server's event streaming infrastructure. This open collaboration platform facilitates communication, coordination, trust and payments for the Internet of Agents ecosystem, making it a significant target for malicious actors seeking to exploit communication channels. The vulnerability specifically resides within the Server-Sent Events (SSE) endpoint located at /sse/v1/..., which serves as a critical communication pathway for real-time data transmission between agents and the server infrastructure.
The technical flaw stems from insufficient authentication and authorization validation mechanisms within the SSE endpoint implementation. Prior to version 1.1.0, the system failed to properly verify that connecting agents were legitimate participants in ongoing sessions, creating a pathway for unauthorized entities to establish connections to the event streaming service. This weak validation process allows potential attackers to inject unauthorized messages into active sessions or observe communications intended for authorized participants. The vulnerability represents a classic case of inadequate access control validation, where the system assumes legitimate participation without proper cryptographic verification or session token validation.
The operational impact of this vulnerability extends beyond simple message injection capabilities, potentially compromising the integrity and confidentiality of agent communications within the Coral Server ecosystem. Attackers could theoretically observe sensitive data flows between agents, inject malicious events that could disrupt coordination processes, or manipulate the trust relationships that the platform is designed to maintain. Given that Coral Server facilitates payments and trust mechanisms, unauthorized access to event streams could enable financial fraud or service disruption attacks that would undermine the entire platform's security posture. This vulnerability directly impacts the platform's ability to maintain secure communication channels between autonomous agents.
The fix implemented in version 1.1.0 addresses the core validation issue by introducing stronger authentication mechanisms for SSE endpoint connections. This remediation aligns with established security practices for event streaming protocols and follows the principle of least privilege by ensuring that only properly authenticated agents can establish connections to session streams. Organizations should prioritize upgrading to version 1.1.0 or later to mitigate this vulnerability, as the exposure window for exploitation remains significant given the platform's role in facilitating agent-to-agent communications and trust-based transactions. The vulnerability classification aligns with CWE-285 (Improper Authorization) and may be mapped to ATT&CK technique T1071.004 (Application Layer Protocol: DNS) when considering the broader communication infrastructure implications, though the primary concern lies in the unauthorized access to streaming endpoints rather than protocol-level manipulation.