CVE-2026-75886: Red Hat Openshift Container Platform 4

High severity, CVSS 7.2. EPSS: 0.3% chance of exploitation in the next 30 days.

A flaw was found in openshift/console. An unauthenticated remote attacker can exploit a misconfiguration in the CatalogdHandler, which lacks proper authentication, and the forwarding of the `openshift-session-token` cookie. This allows the attacker to send requests to the in-cluster catalogd service, leading to the disclosure of the internal operator-catalog index and providing a relay into the openshift-catalogd namespace.

Affected products

• Red Hat Red Hat Openshift Container Platform 4
• Red Hat Red Hat Openshift Container Platform 4.17: before 1789939565 (fixed in 1789939565)
• Red Hat Red Hat Openshift Container Platform 4.18: before 1789904865 (fixed in 1789904865)
• Red Hat Red Hat Openshift Container Platform 4.19: before 1790095950 (fixed in 1790095950)
• Red Hat Red Hat Openshift Container Platform 4.20: before 1790112153 (fixed in 1790112153)
• Red Hat Red Hat Openshift Container Platform 4.21: before 1790142788 (fixed in 1790142788)
• Red Hat Red Hat Openshift Container Platform 4.22: before 1790130905 (fixed in 1790130905)

Published 2026-09-23. Last modified 2026-10-01.