CVE-2026-29954 Details
Description
In KubePlus 4.1.4, the mutating webhook and kubeconfiggenerator components have an SSRF vulnerability when processing the chartURL field of ResourceComposition resources. The field is only URL-encoded without validating the target address. More critically, when kubeconfiggenerator uses wget to download charts, the chartURL is directly concatenated into the command, allowing attackers to inject wget's `--header` option to achieve arbitrary HTTP header injection.
A server-side request forgery (SSRF) vulnerability has been identified in KubePlus version 4.2.0, specifically within the mutating webhook and kubeconfiggenerator components. The issue arises when the chartURL field of ResourceComposition resources is processed. The chartURL is only URL-encoded without proper validation of the target address, allowing attackers to craft malicious URLs. More critically, the kubeconfiggenerator component uses wget to download charts, directly concatenating the chartURL into the command. This vulnerability enables injection of wget's --header option, facilitating arbitrary HTTP header injection.
Restrict outbound network access for KubePlus pods using a network policy that excludes cloud metadata IPs. Additionally, implement chartURL whitelist validation in the KubePlus code.
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 Mar 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0 | [email protected] | ExploitMitigationThird Party Advisory |
| https://github.com/b0b0haha/CVE-2026-29954/blob/main/README.md | [email protected] | ExploitMitigationThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-88 | Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') | CISA-ADP |
| CWE-918 | Server-Side Request Forgery (SSRF) | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| cloudark kubeplus | 4.1.4 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 6, 2026 | Initial Analysis | [email protected] |
| Mar 30, 2026 | CVE Modified | CISA-ADP |
| Mar 30, 2026 | New CVE Received | [email protected] |