CVE-2026-47833

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 4.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.cloudfoundry.org/blog/cve-2026-47833-symlink-vulnerability-in-setupbpmlogs-allows-container-to-host-privilege-escalation-via-etc-shadow/

Configurations

No configuration.

History

18 Jun 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-18 19:16

Updated : 2026-06-18 20:16

NVD link : CVE-2026-47833

Mitre link : CVE-2026-47833

CVE.ORG link : CVE-2026-47833

JSON object : View

Products Affected

No product.

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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