CVE-2026-41861 Details
Description
Path Traversal in BOSH-Ecosystem / BOSH allows an IaaS-metadata attacker to make the agent write a root-owned file with partially attacker-controlled body to any path ending in .network, and create any missing parent directories with mode 0777 via network Alias on Ubuntu. Affected versions: BOSH agent < v2.847.0 (jammy <= v1.1202, or noble <= v1.364). Lower bound unspecified in advisory ("All bosh agent versions").
A path traversal vulnerability has been identified in the BOSH agent, specifically in versions prior to 2.847.0, including jammy versions through 1.1202 and noble versions through 1.364. This vulnerability allows an attacker with access to IaaS metadata to manipulate the agent into writing a file owned by root, with a body partially controlled by the attacker, to any path ending in .network. The agent can also create any necessary parent directories for the file with permissions set to 0777, using the network alias on Ubuntu. The issue arises because the BOSH agent's 'interfaceConfigurationFile' function constructs file paths from user-supplied input without adequate validation, enabling directory traversal.
Users are advised to upgrade the BOSH agent to version 2.847.0 or greater.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 7, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.cloudfoundry.org/blog/cve-2026-41861-arbitrary-root-file-write-via-path-traversal-in-bosh-agent/ | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
No affected product data is available for this CVE.
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 7, 2026 | CVE Modified | CISA-ADP |
| Aug 6, 2026 | New CVE Received | [email protected] |