CVE-2026-7309 — MEDIUM (4.3)

Vulnerability Description

A flaw was found in the OpenShift Container Platform build system. A user with the `edit` ClusterRole can inject arbitrary environment variables, such as `LD_PRELOAD` or `http_proxy`, into `docker-build` containers through the `buildconfigs/instantiate` API. This incomplete fix for a previous vulnerability allows for information disclosure, specifically impacting the confidentiality of build traffic.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Redhat	Openshift Container Platform	4.0

Related Weaknesses (CWE)

CWE-426

References

https://access.redhat.com/security/cve/CVE-2026-7309Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2463451Issue TrackingVendor Advisory

FAQ

What is CVE-2026-7309?

CVE-2026-7309 is a vulnerability with a CVSS score of 4.3 (MEDIUM). A flaw was found in the OpenShift Container Platform build system. A user with the `edit` ClusterRole can inject arbitrary environment variables, such as `LD_PRELOAD` or `http_proxy`, into `docker-bui...

How severe is CVE-2026-7309?

CVE-2026-7309 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-7309?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Openshift Container Platform.