Cloud Foundry bpm-release up to 1.4.29 Password Hash bpm.log link following

Summaryinfo

A vulnerability has been found in Cloud Foundry bpm-release up to 1.4.29 and classified as critical. Affected by this issue is some unknown functionality of the file bpm.log of the component Password Hash Handler. The manipulation leads to link following. This vulnerability is listed as CVE-2026-47833. The attack must be carried out locally. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cloud Foundry bpm-release up to 1.4.29 and classified as problematic. This issue affects an unknown part of the file bpm.log of the component Password Hash Handler. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. Impacted is confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at cloudfoundry.org. The identification of this vulnerability is CVE-2026-47833 since 05/20/2026. The exploitation is known to be difficult. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:bpm.log it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.4.30 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Cloud Foundry

Name

• bpm-release

Version

• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.8
• 1.4.9
• 1.4.10
• 1.4.11
• 1.4.12
• 1.4.13
• 1.4.14
• 1.4.15
• 1.4.16
• 1.4.17
• 1.4.18
• 1.4.19
• 1.4.20
• 1.4.21
• 1.4.22
• 1.4.23
• 1.4.24
• 1.4.25
• 1.4.26
• 1.4.27
• 1.4.28
• 1.4.29

License

• free

CPE 2.3info

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CPE 2.2info

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