How severe is CVE-2026-7309?

CVE-2026-7309 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-7309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7309?

CVE-2026-7309 affects Redhat Openshift Container Platform. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7309?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-7309 have an EU (EUVD) identifier?

Yes. CVE-2026-7309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26043.

When was CVE-2026-7309 published?

CVE-2026-7309 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-7309

CVE-2026-7309 is a medium-severity vulnerability in Redhat Openshift Container Platform with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-426.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26043
Weakness: CWE-426
Affected product: Redhat Openshift Container Platform
Published: 2026-04-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-7309?: 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.
How severe is CVE-2026-7309?: CVE-2026-7309 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-7309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7309?: CVE-2026-7309 affects Redhat Openshift Container Platform. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-7309 have an EU (EUVD) identifier?: Yes. CVE-2026-7309 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26043.
When was CVE-2026-7309 published?: CVE-2026-7309 was published on 2026-04-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*

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