CVE-2026-7309

Name: CVE-2026-7309
Creator: NVD / NIST
Published: 2026-04-28T13:19:24.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2026-7309 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.18%

7.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-426

Affected Software

Vendor	Product	Versions
Redhat	Openshift Container Platform	4.0

References

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

Timeline

Published: Apr 28, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-7309?

How severe is CVE-2026-7309?

CVE-2026-7309 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2026-7309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-7309?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST