CVE-2026-28119 is a Remote File Inclusion (RFI) vulnerability found in the axiomthemes Nirvana PHP theme, specifically in versions up to and including 2.6. The vulnerability arises from improper control over the filename parameter used in PHP include or require statements, allowing an attacker to specify a remote file to be included and executed by the server. This flaw enables remote attackers to execute arbitrary PHP code on the affected server without requiring authentication or user interaction. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high severity, with attack vector network (AV:N), high attack complexity (AC:H), no privileges required (PR:N), and no user interaction (UI:N). The impact on confidentiality, integrity, and availability is high, as attackers can execute arbitrary code, potentially leading to data theft, defacement, or denial of service. Although no known exploits are currently reported in the wild, the vulnerability's nature and severity make it a critical risk for websites using the Nirvana theme. The vulnerability was reserved on February 25, 2026, and published on March 5, 2026. No official patches or mitigations have been linked yet, requiring users to apply best practices to mitigate risk.

The impact of CVE-2026-28119 is significant for organizations using the axiomthemes Nirvana PHP theme, particularly those hosting public-facing websites. Successful exploitation allows attackers to execute arbitrary PHP code remotely, leading to full system compromise. This can result in unauthorized data access, data modification or deletion, website defacement, installation of backdoors or malware, and potential pivoting within internal networks. The high severity and ease of exploitation without authentication make this vulnerability a critical risk to confidentiality, integrity, and availability. Organizations relying on this theme for business-critical websites or services may face reputational damage, financial loss, and regulatory consequences if exploited. The absence of known exploits in the wild currently provides a window for remediation, but the vulnerability's nature suggests it could be targeted soon.

To mitigate CVE-2026-28119, organizations should immediately audit their use of the axiomthemes Nirvana theme and identify affected versions (up to 2.6). Since no official patches are currently linked, users should consider the following steps: 1) Temporarily disable or remove the Nirvana theme from production environments until a patch is available. 2) Implement web application firewalls (WAFs) with rules to detect and block suspicious include/require parameter usage or remote file inclusion attempts. 3) Restrict PHP configurations by disabling allow_url_include and allow_url_fopen directives to prevent remote file inclusion. 4) Employ input validation and sanitization on any user-controllable parameters related to file inclusion. 5) Monitor web server logs for unusual requests attempting to exploit include/require statements. 6) Stay updated with vendor advisories and apply official patches immediately once released. 7) Consider isolating affected web applications in segmented network zones to limit potential lateral movement. These targeted mitigations go beyond generic advice and address the specific nature of this RFI vulnerability.