Reflected Cross-Site Scripting (XSS) vulnerability in Alkacon’s OpenCms_CVE-2026-2736

5.1 / 10

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Description

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.

Basic Information

ID CVE-2026-2736

Source INCIBE

Published Feb 19, 2026 at 08:39

Affected Product

Vendor Alkacon

Product OpenCms

Version 18.0

Affected Versions Alkacon OpenCms 18.0

CWE Classification

CWE-79

References

www.incibe.es /en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms

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    "lastseen": "",
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    "published": "2026-02-19T08:39:46.150Z",
    "modified": "2026-02-19T08:39:46.150Z",
    "type": "cve",
    "title": "Reflected Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms",
    "source": "INCIBE",
    "references": "https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms",
    "id": "CVE-2026-2736",
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    "sourceData": "Alkacon OpenCms 18.0",
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    "cvss": {
        "score": 5.1,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
        "version": "4.0"
    },
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    "cvss3": {
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        "privilegesRequired": "",
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        "availabilityImpact": "",
        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "OpenCms",
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