CVE-2026-29106 SuiteCRM has blind XSS in return_id parameter

Medium 5.9 Published 19 Mar 2026 Updated 20 Mar 2026

Attackers can execute arbitrary scripts in victim browsers via the return_id parameter, potentially leading to session hijacking or data theft.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-29106?

CVE-2026-29106 is a medium-severity cross-site scripting vulnerability in SuiteCRM, published on 19 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to versions 7.15.1 and 8.9.3, the value of the return_id request parameter is copied into the value of an HTML tag attribute which is an event handler and is encapsulated in double quotation marks. Versions 7.15.1 and 8.9.3 patch the issue. Users should also use a Content Security Policy (CSP) header to completely mitigate XSS.

Weakness: CWE-80, CWE-79, CWE-159, CWE-116

Which versions are affected by CVE-2026-29106?

It affects 1 product.

Products include Suitecrm Suitecrm.

How do I fix CVE-2026-29106?

No fix has been published for CVE-2026-29106 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-29106 being exploited?

There is no known exploitation of CVE-2026-29106 in the wild and no public exploit code.

Sources

Also known as GHSA-7qrj-5hj6-7c2m.