Vulnerability · Published Aug 11, 2026 · Assigned by redhat

CVE-2026-19078Ose-oauth-server: oauth-server: open redirect vulnerability enables phishing via unvalidated parameter.

Medium 4.3

In plain English

A medium-severity open redirect in Red Hat OpenShift Container Platform 4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 70.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat OpenShift Container Platform 4	see references
Red Hat	Red Hat OpenShift Container Platform 4	see references

Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References

https://access.redhat.com/security/cve/CVE-2026-19078 vdb-entry, x_refsource_REDHAT
RHBZ#2511975 issue-tracking, x_refsource_REDHAT