CVE-2026-29954 — HIGH (7.6)

Vulnerability 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.

CVSS Score

7.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Cloudark	Kubeplus	4.1.4

Related Weaknesses (CWE)

CWE-88 CWE-918

References

https://gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0ExploitMitigationThird Party Advisory
https://github.com/b0b0haha/CVE-2026-29954/blob/main/README.mdExploitMitigationThird Party Advisory

FAQ

What is CVE-2026-29954?

CVE-2026-29954 is a vulnerability with a CVSS score of 7.6 (HIGH). 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...

How severe is CVE-2026-29954?

CVE-2026-29954 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-29954?

Check the references section above for vendor advisories and patch information. Affected products include: Cloudark Kubeplus.