CVE-2026-47833 Path traversal in bpm-release
A compromised container process can exploit symlink handling to chown host files, enabling root to read sensitive data like /etc/shadow.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-47833?
CVE-2026-47833 is a medium-severity path traversal vulnerability in Cloud Foundry Foundation bpm-release, published on 18 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-59
Which versions are affected by CVE-2026-47833?
How do I fix CVE-2026-47833?
No fix has been published for CVE-2026-47833 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-47833 being exploited?
There is no known exploitation of CVE-2026-47833 in the wild and no public exploit code.
Sources
Also known as GHSA-xhf5-x86m-mrgw.