CVE-2026-53473 Migration-planner-ui-app: stored xss via javascript: url in agent credential link
Attackers can inject malicious JavaScript via agent credential links, compromising user SSO sessions and enabling unauthorized data access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-53473?
CVE-2026-53473 is a high-severity cross-site scripting vulnerability in kubev2v:migration_planner_ui, published on 10 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A flaw was found in migration-planner-ui-app. An attacker can register a malicious discovery agent with a specially crafted credentialUrl containing JavaScript code. When an organizational user clicks this link in the user interface, the embedded malicious code executes within the user's browser session. This cross-site scripting (XSS) vulnerability allows the attacker to compromise the victim's Red Hat Single Sign-On (SSO) session, potentially leading to unauthorized cross-tenant data access and API actions.
Weakness: CWE-79
Which versions are affected by CVE-2026-53473?
It affects 1 product.
Products include Kubev2v Migration Planner Ui.
How do I fix CVE-2026-53473?
No fix has been published for CVE-2026-53473 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-2026-53473 being exploited?
There is no known exploitation of CVE-2026-53473 in the wild and no public exploit code.
Sources
Also known as GHSA-g89r-93r3-rqqp.