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.

Score

CVSS 3.1 6.1 Medium

Status

Analyzed - cve-coordination@incibe.es

Published

2026-02-19

Last modified

2026-03-09

Weaknesses

CWE-79

Affected products

• Opencms (Alkacon)

References

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