Vulnerability in Red Hat Openshift Data Foundation 4
CVE-2025-8766
A container privilege escalation flaw was found in certain Multi-Cloud Object Gateway Core images. This issue stems from the /etc/passwd file being created with group-writable permissions during build time. In certain conditions, an attacker who can execute commands within an affected container, even as a non-root user, can leverage their membership in the root group to modify the /etc/passwd file. This could allow the attacker to add a new user with any arbitrary UID, including UID 0, leading to full root privileges within the container
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Red Hat Openshift Data Foundation 4
- Red Hat Openshift Data Foundation 4.22 — versions 1782932114, 1782931768, 1782932104
- Red Hat Openshift Data Foundation — versions 4.0
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2025-8766 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Third Party Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- access.redhat.com/errata/RHSA-2026:37387 (vendor-advisory)
Frequently asked questions
- What is CVE-2025-8766?
- CVE-2025-8766 is a medium-severity vulnerability in Red Hat Openshift Data Foundation 4, classified under Incorrect Default Permissions. CVSS score: 6.4/10. Published 2026-03-13.
- How severe is CVE-2025-8766?
- Medium severity. CVSS v3 base score is 6.4 out of 10.