High severity7.6NVD Advisory· Published Mar 30, 2026· Updated Apr 6, 2026
CVE-2026-29954
CVE-2026-29954
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.
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Affected products
2Patches
Vulnerability mechanics
References
2- gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0nvdExploitMitigationThird Party Advisory
- github.com/b0b0haha/CVE-2026-29954/blob/main/README.mdnvdExploitMitigationThird Party Advisory
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