CVE-2026-19078 Ose-oauth-server: oauth-server: open redirect vulnerability enables phishing via unvalidated parameter.
Attackers can redirect authenticated users to malicious sites via unvalidated parameters, enabling phishing attacks on OpenShift users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-19078?
CVE-2026-19078 is a medium-severity vulnerability in Red Hat OpenShift Container Platform 4, published on 11 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw was found in the oauth-server component. This open redirect vulnerability occurs when the 'then' parameter in the grant approval handler is not properly validated. A remote attacker can craft a malicious URL that, when approved or denied by an authenticated user, redirects them to an attacker-controlled website. This could enable phishing attacks, potentially tricking users into revealing sensitive information.
Weakness: CWE-601
Which versions are affected by CVE-2026-19078?
How do I fix CVE-2026-19078?
No fix has been published for CVE-2026-19078 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19078 being exploited?
There is no known exploitation of CVE-2026-19078 in the wild and no public exploit code.
Sources
Also known as GHSA-mx5m-xr46-c5gf.