CVE-2026-2736
Reflected Cross-Site Scripting (XSS) vulnerability in Alkacon's OpenCms
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.
INFO
Published Date :
Feb. 19, 2026, 8:39 a.m.
Last Modified :
Feb. 19, 2026, 8:39 a.m.
Remotely Exploit :
Yes !
Source :
INCIBE
Affected Products
The following products are affected by CVE-2026-2736
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 0cbda920-cd7f-484a-8e76-bf7f4b7f4516 |
Solution
- Update Alkacon OpenCms to a patched version.
- Sanitize user input for the 'q' parameter.
- Avoid executing user-supplied data as code.
- Implement output encoding for all user input.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2736 vulnerability anywhere in the article.