Una una una SSRF Vulnerability in SeaweedFS Allows Server-Side Request Forgery
On August 12, 2026, INCIBE-CERT published a notice about a critical severity vulnerability in SeaweedFS. This flaw, identified as CVE-2026-73080, affects versions prior to 0.0.0-20260512171120-69da20bdaec9 and allows unauthenticated server-side request forgery (SSRF).
Technical Details of the SSRF Vulnerability in SeaweedFS
The vulnerability resides in the VolumeServer.FetchAndWriteNeedle function, which does not authenticate or validate the destination of the requests made. This allows a remote attacker to induce the server to make requests to arbitrary hosts.
With no validation or authentication in this function, the server can send requests to internal services that would normally not be accessible from the outside. Additionally, the attacker could read the responses from these requests.
Impact and Risks Associated with Exploitation
Exploiting this vulnerability could allow access to unexposed internal services and the exposure of IAM metadata and credentials in cloud environments. This poses a risk to the confidentiality and integrity of the affected systems.
INCIBE-CERT notes that the lack of authentication and validation in the affected function increases the possibilities of unauthorized access to sensitive information hosted in the infrastructure where SeaweedFS is used.
Recommended Solution
To fix this vulnerability, it is recommended to update SeaweedFS to version 0.0.0-20260512171120-69da20bdaec9. This version corrects the lack of authentication and validation in the VolumeServer.FetchAndWriteNeedle function, closing the possibility of remote exploitation via SSRF.
Context and Official Sources
The notice was disseminated by INCIBE-CERT, an entity that manages early alerts on cybersecurity in Spain. The critical severity classification highlights the importance of addressing this vulnerability.
Functionality and Scope of the SSRF Vulnerability in SeaweedFS
The SSRF vulnerability in SeaweedFS originates from the VolumeServer.FetchAndWriteNeedle function, which is responsible for managing certain internal system requests. The absence of authentication and validation mechanisms in this function allows a remote attacker to manipulate the server into making HTTP requests to arbitrary destinations, including internal services that would normally not be accessible from the outside.
This ability to induce the server to make unauthorized requests can lead to reading the responses returned by those services. Among the associated risks is the potential exposure of IAM metadata and credentials, especially in cloud environments where SeaweedFS is deployed. The reading of these responses broadens the potential impact, as it not only limits itself to making requests but also obtaining sensitive information that could be used for subsequent attacks or lateral movements within the infrastructure.
Details on Vulnerability Management and Follow-Up
INCIBE-CERT has classified this vulnerability with a critical severity level, reflecting the seriousness of the lack of authentication in the affected function. The official notice recommends updating to version 0.0.0-20260512171120-69da20bdaec9 of SeaweedFS, which incorporates the necessary fixes to properly validate and authenticate requests made by VolumeServer.FetchAndWriteNeedle.
It is important to note that, according to available information, no confirmed cases of active exploitation in real environments have been reported, nor are there additional measures detailed beyond the update. Therefore, the follow-up on this alert focuses on applying the corrected version to mitigate the risk associated with this SSRF vulnerability in SeaweedFS.
Detailed information is available at the original source from INCIBE.
Limitations of Available Information
The source does not specify whether the vulnerability has been exploited in real environments nor detail its scope in specific infrastructures. No additional measures other than the recommended update are mentioned.
Published: 16/08/2026. Content reviewed using experience, authority and trustworthiness criteria (E-E-A-T).
This article may have used artificial intelligence tools to support structure, editing, translation or review. Editorial responsibility and final review remain with Toni Berraquero. View AI policy
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