CVE-2026-29954
KubePlus SSRF/Arbitrary HTTP Header Injection
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.
INFO
Published Date :
March 30, 2026, 5:16 p.m.
Last Modified :
April 6, 2026, 3:51 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Validate chartURL to prevent SSRF.
- Sanitize user input for wget command.
- Update KubePlus to the latest version.
- Restrict network access for chart downloads.
Public PoC/Exploit Available at Github
CVE-2026-29954 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-29954.
| URL | Resource |
|---|---|
| https://gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0 | Exploit Mitigation Third Party Advisory |
| https://github.com/b0b0haha/CVE-2026-29954/blob/main/README.md | Exploit Mitigation Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-29954 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-29954
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-29954 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-29954 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 06, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:cloudark:kubeplus:4.1.4:*:*:*:*:*:*:* Added Reference Type MITRE: https://gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0 Types: Exploit, Mitigation, Third Party Advisory Added Reference Type MITRE: https://github.com/b0b0haha/CVE-2026-29954/blob/main/README.md Types: Exploit, Mitigation, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 30, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N Added CWE CWE-88 Added CWE CWE-918 -
New CVE Received by [email protected]
Mar. 30, 2026
Action Type Old Value New Value Added 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. Added Reference https://gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0 Added Reference https://github.com/b0b0haha/CVE-2026-29954/blob/main/README.md