CVE-2026-47617 in Dynamo
Summary
by MITRE • 08/04/2026
NVIDIA Dynamo for Linux contains a vulnerability in the multimodal media fetcher where an attacker may cause server-side request forgery via DNS rebinding. A successful exploit of this vulnerability might lead to information disclosure.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/04/2026
The vulnerability identified in NVIDIA Dynamo for Linux represents a critical security flaw within the multimodal media fetcher component that enables server-side request forgery through DNS rebinding techniques. This vulnerability resides in the way the system handles multimedia content retrieval operations, specifically when processing requests for external media resources. The flaw allows malicious actors to manipulate DNS resolution behavior to redirect requests from legitimate external services to internal network resources, effectively bypassing normal network security controls and access restrictions.
The technical implementation of this vulnerability stems from inadequate validation and sanitization of URI schemes and hostnames within the media fetching process. When the system processes requests for multimedia content, it fails to properly validate the destination addresses against known safe domains or implement proper network boundary checks. DNS rebinding attacks exploit the fact that DNS resolution can be manipulated during the request lifecycle, allowing an attacker to initially resolve a domain name to an external IP address and then redirect subsequent requests to internal network addresses without proper authorization checks.
This vulnerability directly maps to CWE-918, which describes server-side request forgery vulnerabilities where applications fail to properly validate or restrict the destinations of HTTP requests. The operational impact of such a flaw extends beyond simple information disclosure, as it can potentially enable attackers to access internal services that should remain isolated from external networks. Depending on the configuration and network topology, successful exploitation could lead to unauthorized access to internal databases, system management interfaces, or other sensitive resources that are typically protected by network segmentation.
The attack vector leverages fundamental weaknesses in DNS handling and request validation mechanisms that are commonly found in media processing systems where external content integration is required. When combined with proper timing and DNS manipulation techniques, attackers can effectively bypass normal network security controls and gain access to resources that should be restricted. This type of vulnerability is particularly dangerous in enterprise environments where internal network services may contain sensitive data or critical system components.
Security mitigation strategies for this vulnerability should include implementing strict URI validation mechanisms that prevent requests from being directed to internal network addresses, enforcing proper DNS resolution policies that prevent rebinding attacks, and establishing network segmentation controls that isolate media processing components from sensitive internal resources. Organizations should also consider implementing request filtering rules that block known dangerous URI schemes and establish monitoring protocols to detect suspicious patterns in media fetching operations. The implementation of these controls aligns with ATT&CK technique T1566 which describes social engineering attacks including the use of DNS rebinding to bypass network security controls.
Additional protective measures include deploying web application firewalls with content filtering capabilities, implementing proper access control lists for media service endpoints, and conducting regular security assessments of external integration points. The vulnerability demonstrates the importance of validating all external resource requests and implementing robust input sanitization processes that prevent attackers from manipulating system behavior through DNS resolution manipulation. Organizations should also consider implementing network monitoring solutions that can detect anomalous DNS traffic patterns indicative of rebinding attacks and establish incident response procedures specifically tailored to address server-side request forgery vulnerabilities in multimedia processing systems.