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VulnerabilityPublished Updated

CVE-2026-75886: Red Hat OpenShift Container Platform 4.17 · Confused Deputy

Affects Red Hat OpenShift Container Platform 4.17Source CVE Database V5

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Not known to be exploited · CVSS 7.2 High · fixed in Red Hat OpenShift Container Platform 4.17 package updates : patch Red Hat OpenShift Container Platform 4.17 soon.

Data as of 5 Nov 2026, 23:24 UTC

CVSS 3.1 base score
7.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.20.40
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 23 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat OpenShift Container Platform 4.17Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.18Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.19Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.20Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.21Affected–Fixed in–
Red HatRed Hat OpenShift Container Platform 4.22Affected–Fixed in–

AI-suggested

Red Hat has released OpenShift Container Platform 4.20.40, which includes fixes for CVE-2026-75886. Users of OpenShift Container Platform 4.19 are advised to upgrade to version 4.20.40 or later to remediate this vulnerability. Instructions for upgrading clusters are available in the Red Hat documentation. No alternative mitigations or temporary fixes are indicated in the advisory.

Description

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.

References

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