Link following in Cloud Foundry Foundation bpm-release
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Cloud Foundry Foundation | bpm-release | before 1.4.30 | 1.4.30 | Patch available | CNA |
- bpm-release VendorCloud Foundry Foundation Affected before 1.4.30 Fixed in 1.4.30 Patch available CNA
Remediation
- Fix · CNA bpm-release (Cloud Foundry Foundation) Fixed in 1.4.30
Timeline
- 2026-10-02 Threatist record created from CVE-2026-47833
- 2026-10-03 Alias added: GHSA-xhf5-x86m-mrgw
References
More Cloud Foundry Foundation vulnerabilities
- TI-2026-29616 Information disclosure in Cloud Foundry Foundation uaa_release CVSS 4.0CRITICAL 10.0
- TI-2026-35291 Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin CVSS 4.0CRITICAL 9.2
- TI-2026-29615 Improper authentication in Cloud Foundry Foundation log-cache_release CVSS 3.1HIGH 7.5
- TI-2026-35283 Incorrect Permission Assignment Allows Local Privilege Escalation to SYSTEM via Executable Overwrite CVSS 4.0HIGH 8.5
- TI-2026-35280 CVE-2026-47827 – BOSH CLI Powershell Injection CVSS 3.1HIGH 7.5
- TI-2026-29662 OS command injection in Cloud Foundry Foundation BOSH CVSS 4.0HIGH 8.7
Sources
- CVE-2026-47833 · CVE Program
- CVE-2026-47833 · NVD
- FIRST EPSS
- GHSA-xhf5-x86m-mrgw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences