CVE-2026-3054 in SOGo
Summary
by MITRE • 02/24/2026
A vulnerability was identified in Alinto SOGo 5.12.3/5.12.4. This impacts an unknown function. The manipulation of the argument hint leads to cross site scripting. The attack can be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 02/28/2026
The vulnerability CVE-2026-3054 represents a cross-site scripting flaw discovered in Alinto SOGo versions 5.12.3 and 5.12.4, highlighting a critical security weakness in web application input validation mechanisms. This issue resides within an unknown function of the software, suggesting a potential oversight in the codebase's sanitization processes for user-supplied data. The vulnerability specifically manifests when the hint argument is manipulated, indicating that the application fails to properly validate or escape input parameters before processing them in web responses. This type of vulnerability falls under CWE-79, which categorizes cross-site scripting as a critical weakness in web applications, where malicious scripts can be injected into web pages viewed by other users. The attack vector is remotely exploitable, meaning that adversaries can initiate the vulnerability without requiring physical access to the system or local network presence, making it particularly dangerous for publicly accessible web applications.
The operational impact of CVE-2026-3054 extends beyond simple data corruption or unauthorized access, as cross-site scripting vulnerabilities can enable attackers to hijack user sessions, steal sensitive information, or perform unauthorized actions on behalf of legitimate users. Given that the exploit is publicly available and potentially in use, organizations running affected Alinto SOGo versions face immediate risk of compromise. The lack of vendor response despite early disclosure indicates a potential gap in the security community's engagement with this particular software vendor, leaving organizations without official patches or mitigation guidance. This scenario creates a high-risk environment where security teams must implement emergency measures while waiting for vendor-provided solutions. The vulnerability's presence in multiple versions suggests a systemic issue within the application's input handling architecture rather than a isolated incident, potentially indicating broader security flaws in the software's design principles.
Organizations affected by CVE-2026-3054 should implement immediate defensive measures including input validation and output encoding for all user-supplied parameters, particularly those related to hint functionality. Network-level protections such as web application firewalls can provide temporary mitigation while permanent fixes are developed, though these solutions may not be comprehensive against sophisticated attacks. The ATT&CK framework's T1566 technique for "Phishing with Malicious Attachments" or T1211 for "Exploitation for Defense Evasion" could be relevant in how attackers might leverage this vulnerability, making it essential for security teams to monitor for suspicious user behavior or network traffic patterns. System administrators should consider implementing additional monitoring for unusual parameter usage patterns and conduct thorough security assessments of all web applications to identify similar vulnerabilities. The vulnerability's classification under the broader category of web application security flaws aligns with ATT&CK's web application attack patterns, emphasizing the need for comprehensive security testing including dynamic application security testing and manual penetration testing to identify similar issues in the application's codebase.