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    CVE-2026-2736

    Reflected Cross-site Scripting (XSS) in Alkacon's OpenCms v18.0, which allows an attacker to execute JavaScript code in the victim's browser by sending the victim a malicious URL containing the ‘q’ parameter in ‘/search/index.html’. This vulnerability can be exploited to steal sensitive user information such as session cookies, or to perform actions while impersonating the user.

    Published:Feb 19, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 19, 2026
    EPSS Score:0.00034
    CVSS Score:6.1

    Affected Products

    Vendor
    Alkacon
    Product
    Opencms

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2023-42345 (CVSS 6.1) — A Cross Site Scripting vulnerability in Alkacon OpenCms before 16 exists via updateModelGroups.jsp.…
    CVE-2023-42343 (CVSS 6.1) — A Cross Site Scripting vulnerability in Alkacon OpenCms before 10.5.1 exists via cmis-online/type.…
    CVE-2023-42346 (CVSS 7.5) — Alkacon OpenCms before 16 allows XXE when the <!DOCTYPE> refers to an external host.…
    CVE-2026-38429 (CVSS 9.8) — OpenCMS v20 and before is vulnerable to XML External Entity (XXE) in the Admin Import DB feature due to insecu…
    CVE-2026-2735 (CVSS 5.1) — Stored Cross-Site Scripting (XSS) in Alkacon's OpenCms v18.0, which occurs when user input is not properly val…
    CVE-2024-41446 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability in Alkacon OpenCMS v17.0 allows attackers to execute arbitra…
    CVE-2024-42699 (CVSS 6.5) — Cross Site Scripting vulnerability in Create/Modify article function in Alkacon OpenCMS 17.0 allows remote att…
    CVE-2024-41447 (CVSS 5.4) — A stored cross-site scripting (XSS) vulnerability in Alkacon OpenCMS v17.0 allows attackers to execute arbitra…
    CVE-2024-5521 (CVSS 6.4) — Two Cross-Site Scripting vulnerabilities have been discovered in Alkacon's OpenCMS affecting version 16, which…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High