CVE-2026-48068 in gRPC
Summary
by MITRE • 07/15/2026
@grpc/grps-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.9.16, 1.10.12, 1.11.4, 1.12.7, 1.13.5, and 1.14.4, an invalid incoming HTTP/2 stream initiation can cause a server process created using @grpc/grpc-js to crash. This issue is fixed in versions 1.9.16, 1.10.12, 1.11.4, 1.12.7, 1.13.5, and 1.14.4.
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Analysis
by VulDB Data Team • 07/15/2026
The vulnerability identified in @grpc/grpc-js represents a critical denial of service condition that affects the JavaScript implementation of gRPC protocols. This issue specifically targets the HTTP/2 stream handling mechanism within the server process, where malformed or invalid stream initiations can trigger unexpected termination of the entire application. The flaw exists in versions prior to the mentioned patched releases, creating a persistent risk for systems relying on this JavaScript-based gRPC implementation for microservices communication and distributed system integration.
The technical root cause of this vulnerability lies in inadequate input validation within the HTTP/2 stream processing logic. When an invalid stream initiation occurs, the server process fails to properly handle the malformed data structure, leading to an unhandled exception that results in complete process termination. This behavior aligns with CWE-400 vulnerability classification related to unchecked resource consumption and CWE-691 issues concerning inadequate input validation of HTTP protocol elements. The flaw demonstrates a classic lack of proper error handling and defensive programming practices in network protocol implementations.
From an operational perspective, this vulnerability presents significant risks for production environments where gRPC services are deployed as part of critical infrastructure. A malicious actor or even a simple network anomaly could cause service disruption through carefully crafted invalid HTTP/2 streams, potentially leading to cascading failures across interconnected microservices. The impact extends beyond simple availability concerns as the crash affects not just individual service endpoints but can compromise entire distributed application architectures that depend on gRPC for inter-service communication patterns.
The mitigation strategy involves immediate deployment of patched versions 1.9.16, 1.10.12, 1.11.4, 1.12.7, 1.13.5, and 1.14.4 which include proper error handling mechanisms for invalid HTTP/2 stream initiations. Organizations should also implement network-level protections such as HTTP/2 protocol validation at load balancers or reverse proxies to filter malformed streams before they reach the application layer. Additionally, monitoring systems should be configured to detect unusual process termination patterns that could indicate exploitation attempts. This vulnerability demonstrates the importance of robust input validation and proper exception handling in network services, particularly those implementing complex protocols like HTTP/2 that are susceptible to various forms of malformed data attacks. The fix addresses fundamental security weaknesses that align with ATT&CK technique T1499.004 related to network disruption through service availability attacks.
The broader implications of this vulnerability extend to the security posture of JavaScript-based microservices architectures, highlighting the need for comprehensive protocol validation and error handling in all network-facing components. This issue serves as a reminder that even high-level language implementations of core networking protocols must maintain rigorous security practices to prevent exploitation through malformed input data patterns.