EUVD-2026-37929
GHSA-xhf5-x86m-mrgw
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
S:C applied because exploitation crosses the container-to-host boundary, affecting host-level resources (/etc/shadow) outside the vulnerable container's authority.
Primary rating from Vendor (vmware).
CVSS VectorVendor: vmware
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
setupBpmLogs follows symlink for bpm.log open and chown - container-to-host privilege escalation via /etc/shadow. A compromised process inside a bpm container can cause root to chown an arbitrary host file to vcap and append bpm JSON log lines to it. The chown alone lets the attacker take ownership of /etc/shadow and read every password hash on the host via the read-only /etc bind mount. This is a container-to-host confidentiality break affecting every bpm-managed job.
Affected versions: bpm-release, all versions prior to v1.4.30.
AnalysisAI
Symlink-following in Cloud Foundry bpm-release's setupBpmLogs function enables a container-to-host confidentiality breach, allowing a compromised low-privileged process inside a bpm container to manipulate root into chowning an arbitrary host file - including /etc/shadow - to the vcap user. All bpm-release versions prior to v1.4.30 are affected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already have code execution inside a bpm-managed container (PR:L - a low-privileged process foothold within the container is sufficient). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 3.1 score of 6.1 with S:U (Unchanged scope) appears to understate real-world impact: this vulnerability crosses a container-to-host security boundary, which in standard CVSS methodology typically warrants S:C (Changed scope), and would yield a higher base score closer to 7.3. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has achieved code execution inside a Cloud Foundry bpm-managed job container - for example, through a vulnerability in a deployed application - creates a symbolic link at the expected bpm.log path within the container pointing to /etc/shadow on the host filesystem. When the root-level setupBpmLogs function runs (e.g., on job start or log rotation), it follows the symlink and chowns /etc/shadow to the vcap user without resolving the link first. … |
| Remediation | The primary fix is to upgrade bpm-release to v1.4.30 or later, which corrects the symlink-following behavior in setupBpmLogs. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-59 – Improper Link Resolution Before File Access
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today