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CVE Vulnerability Details :

CVE-2026-2736

PUBLISHED

More Info Official Page

Assigner-INCIBE

Assigner Org ID-0cbda920-cd7f-484a-8e76-bf7f4b7f4516

Published At-19 Feb, 2026 | 08:39

Updated At-19 Feb, 2026 | 08:39

▼CVE Numbering Authority (CNA)

Reflected Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms

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.

Affected Products

Vendor

Alkacon

Product

OpenCms

Default Status

unaffected

Versions

Affected

18.0

Problem Types

Type	CWE ID	Description
CWE	CWE-79	CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Type: CWE

CWE ID: CWE-79

Description: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Metrics

Version	Base score	Base severity	Vector
4.0	5.1	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

Version: 4.0

Base score: 5.1

Base 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

Solutions

The vulnerabilities have been fixed by the Alkacon team in version 19.0.

Credits

finder

Gonzalo Aguilar García (6h4ack)

References

Hyperlink	Resource
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-alkacons-opencms	patch

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

Resource:

patch

Affected Products

Affected

Problem Types

Metrics

Metrics Other Info

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Solutions

Configurations

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Exploits

Credits

Timeline

Replaced By

Rejected Reason

References