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
CVE-2025-8766
MEDIUMNVD 6.46.4—
EchelonGraph scoreMEDIUM confidence
Score 6.4 from GitHub Security Advisory published 2026-03-13. the CNA's CVSS baseline 6.4; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: cna:redhat, epss, ghsa
6.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.4Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.4
- EG Score
- 6.4(medium)
- EPSS
- 6.1%
- KEV
- Not listed
Published
March 13, 2026
Last Modified
July 10, 2026
Advisory Details (3)
Auto-updated Jul 9, 2026Patch available. Sources: redhat.
redhat
2387265 – (CVE-2025-8766) CVE-2025-8766 noobaa-core: Excessive permissions of /etc could lead to escalation of privilege in the noobaa-core container
https://bugzilla.redhat.com/show_bug.cgi?id=2387265redhat Patch Available
Vendor Advisories for CVE-2025-8766(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:37387Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update
- GHSA-fmgm-mwqg-8w89GitHub Security AdvisoriesMedium
A container privilege escalation flaw was found in certain Multi-Cloud Object Gateway Core images...
Frequently asked(5)
What is CVE-2025-8766?
CVE-2025-8766 is a medium vulnerability published on March 13, 2026. 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,…
When was CVE-2025-8766 disclosed?
CVE-2025-8766 was first published in the National Vulnerability Database on March 13, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-8766 actively exploited?
CVE-2025-8766 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 6.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-8766?
CVE-2025-8766 has a CVSS v3 base score of 6.4 (NVD).
How do I remediate CVE-2025-8766?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-8766, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2025-8766
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