Authenticated SSRF in Apache Gravitino JobManager

Executive Summary

CVE-2026-49876 is an authenticated Server-Side Request Forgery (SSRF) vulnerability in the Apache Gravitino JobManager component. It allows an attacker with valid authentication to make HTTP requests from the server to internal network resources or cloud metadata endpoints by exploiting unvalidated job template URIs.

Useful 0 Not Useful 0

Detection Guidance

Detecting CVE-2026-49876 on your network or system involves checking for signs of exploitation or verifying the installed version of Apache Gravitino. Since this vulnerability is an authenticated SSRF in the JobManager component, you can focus on monitoring unusual outbound HTTP requests from the Gravitino server to internal or cloud metadata endpoints.

• Check the installed version of Apache Gravitino. If it is between 1.0.0 and 1.2.1, the system is vulnerable. You can verify the version by running the following command if Gravitino provides a version check: `gravitino --version` or by inspecting the installation directory for version files.
• Monitor network traffic from the Gravitino server for unexpected HTTP requests to internal IP ranges (e.g., 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) or cloud metadata endpoints (e.g., AWS 169.254.169.254, GCP 169.254.169.254). Tools like tcpdump or Wireshark can be used for this purpose. Example command: `tcpdump -i eth0 'dst net 10.0.0.0/8 or dst net 172.16.0.0/12 or dst net 192.168.0.0/16 or dst host 169.254.169.254'`
• Review Gravitino logs for suspicious job template URIs that may indicate exploitation attempts. Look for URIs containing internal IP addresses or metadata endpoints in the JobManager logs.
• If you have an intrusion detection system (IDS) or web application firewall (WAF), configure rules to alert on requests containing internal IP addresses or metadata endpoints in job template submissions.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can allow an attacker to access internal network services or sensitive cloud metadata endpoints that are normally not accessible externally. This could lead to unauthorized information disclosure, potential further exploitation of internal systems, or compromise of cloud infrastructure.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability CVE-2026-49876, an authenticated Server-Side Request Forgery (SSRF) in Apache Gravitino, can impact compliance with standards and regulations like GDPR and HIPAA due to its potential to expose sensitive internal data or allow unauthorized access to internal systems.

• GDPR: The vulnerability may lead to unauthorized access to internal network resources or cloud metadata endpoints, potentially exposing personal data. Under GDPR, organizations must protect personal data from unauthorized access, and a breach could result in non-compliance, fines, or legal consequences.
• HIPAA: For organizations handling protected health information (PHI), this vulnerability could allow attackers to access internal systems containing PHI. Unauthorized access to such data violates HIPAA's Security Rule, which requires safeguards to protect the confidentiality and integrity of PHI.

Additionally, the CVSS score of 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) indicates a moderate risk with high confidentiality impact, which may trigger reporting requirements under these regulations if a breach occurs.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate the CVE-2026-49876 vulnerability in Apache Gravitino, users should upgrade their Gravitino installation to version 1.3.0 or later.

This upgrade addresses the authenticated SSRF flaw in the JobManager component that allows server-side HTTP requests to internal networks and cloud metadata endpoints via unvalidated job template URIs.

Useful 0 Not Useful 0