CVE-2026-4907 in Page Replica
Summary
by MITRE • 03/27/2026
A vulnerability was identified in Page-Replica Page Replica up to e4a7f52e75093ee318b4d5a9a9db6751050d2ad0. The impacted element is the function sitemap.fetch of the file /sitemap of the component Endpoint. The manipulation of the argument url leads to server-side request forgery. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The vendor was contacted early about this disclosure but did not respond in any way.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 07/06/2026
This vulnerability represents a critical server-side request forgery flaw within the Page-Replica system that affects versions up to commit e4a7f52e75093ee318b4d5a9a9db6751050d2ad0. The vulnerability specifically resides in the sitemap.fetch function located within the /sitemap endpoint component, where improper input validation allows attackers to manipulate the url argument parameter. This flaw enables remote attackers to initiate unauthorized server-side requests to arbitrary destinations, potentially allowing them to access internal network resources or perform unauthorized operations against systems that the vulnerable service can reach.
The technical implementation of this vulnerability stems from insufficient sanitization and validation of user-supplied URL parameters within the sitemap.fetch function. When the application processes a request containing a manipulated url argument, it fails to properly validate or sanitize the input before using it in server-side network operations. This allows attackers to craft malicious requests that can force the vulnerable system to make HTTP requests to internal services, external domains, or even attempt to exploit other systems within the network perimeter. The vulnerability is classified under CWE-918 as Server-Side Request Forgery, which specifically addresses the risk of attackers manipulating applications into making unintended requests to arbitrary destinations.
The operational impact of this vulnerability is substantial given its remote exploitability and the publicly available nature of the exploit. Attackers can leverage this flaw to perform reconnaissance activities by accessing internal services that would normally be protected from external access, potentially discovering additional vulnerabilities or sensitive information within the network. The rolling release strategy employed by Page-Replica complicates remediation efforts as specific version details are unavailable, making it challenging for organizations to determine their exposure level or implement targeted patches. This vulnerability can be exploited to escalate privileges, access sensitive data, or create pivot points for further attacks within the compromised environment.
The attack vector is particularly concerning due to its remote nature and the lack of vendor response despite early disclosure attempts. This suggests potential security mismanagement or inadequate vulnerability handling processes within the product development lifecycle. Organizations should implement immediate mitigations including network-level restrictions on outbound connections from affected systems, input validation controls at the application layer, and monitoring for suspicious request patterns that may indicate exploitation attempts. The absence of vendor response creates additional risk as there is no official patch or mitigation guidance available, forcing organizations to rely on defensive measures such as web application firewalls, rate limiting, and network segmentation to protect against potential exploitation.
Security practitioners should consider this vulnerability in their ATT&CK framework analysis under the T1190 technique for Exploit Public-Facing Application, with potential lateral movement implications through T1071.3 for Application Layer Protocol: Web Protocols. The lack of vendor response indicates a potential gap in responsible disclosure processes and highlights the importance of proactive security measures when dealing with vulnerable software that lacks official support or patching mechanisms. Organizations should also consider implementing comprehensive monitoring solutions to detect anomalous outbound requests that may indicate exploitation attempts against this vulnerability.