CVE-2026-2945 is a server-side request forgery (SSRF) vulnerability identified in JeecgBoot version 3.9.0, specifically within the /sys/common/uploadImgByHttp endpoint. The vulnerability arises from insufficient validation or sanitization of the fileUrl parameter, which an attacker can manipulate to coerce the server into making arbitrary HTTP requests. SSRF vulnerabilities enable attackers to interact with internal systems or services that are otherwise inaccessible externally, potentially leading to information disclosure, internal network scanning, or further exploitation of internal services. The vulnerability can be exploited remotely without requiring authentication or user interaction, increasing its risk profile. The vendor was notified early but has not issued a patch or response, and a public exploit is available, facilitating potential attacks. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and low impact on confidentiality, integrity, and availability. Although no active exploitation in the wild is currently known, the availability of a public exploit and lack of vendor remediation heighten the threat to affected systems. JeecgBoot is an open-source rapid development platform widely used in enterprise Java applications, so the vulnerability could affect multiple organizations relying on this framework for web applications.

The SSRF vulnerability in JeecgBoot 3.9.0 can have significant impacts on organizations using this software. Attackers exploiting this flaw can make the vulnerable server send arbitrary HTTP requests, potentially accessing internal services, metadata endpoints, or other protected resources within the organization's network. This can lead to unauthorized information disclosure, such as internal IP addresses, sensitive configuration data, or cloud metadata, which can be leveraged for further attacks. While the direct impact on confidentiality, integrity, and availability is rated low to medium, the SSRF can serve as a pivot point for more severe attacks, including lateral movement or privilege escalation within internal networks. The lack of authentication and user interaction requirements increases the risk of automated exploitation. Organizations with JeecgBoot-based applications exposed to the internet are particularly at risk. The absence of a vendor patch and the presence of public exploits further elevate the threat level, potentially leading to data breaches or disruption of services if exploited in combination with other vulnerabilities.

To mitigate CVE-2026-2945, organizations should immediately implement the following measures: 1) Restrict network egress from application servers to only necessary external endpoints using firewall rules or network segmentation to limit SSRF impact. 2) Implement strict input validation and sanitization on the fileUrl parameter to ensure only allowed URLs or domains can be requested, ideally using a whitelist approach. 3) Employ web application firewalls (WAFs) with rules designed to detect and block SSRF attack patterns targeting the /sys/common/uploadImgByHttp endpoint. 4) Monitor application logs for unusual outbound HTTP requests originating from the vulnerable endpoint. 5) If possible, upgrade or patch JeecgBoot once the vendor releases a fix; meanwhile, consider disabling or restricting access to the vulnerable functionality. 6) Conduct internal penetration testing and code reviews to identify and remediate similar SSRF weaknesses in custom code. 7) Educate developers on secure coding practices to prevent SSRF and related vulnerabilities in future development. These targeted actions go beyond generic advice by focusing on network controls, input validation, and proactive detection tailored to the specific vulnerable endpoint and parameter.