CVE-2026-29954

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 v3.1 CNA

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

EPSS

0.39% chance of exploitation in the next 30 days, 32nd percentile

Published

2026-03-30

Proof-of-concept exploits (2)

• https://gist.github.com/b0b0haha/33baea60fd2a847f11f1fb02e43c64c0
• b0b0haha/CVE-2026-299540★ · 2026-03-27

Security advisories

• b0b0haha/CVE-2026-29954/blob/main/README.md

References

• CVE Record
• NVD entry

Related

• CVE-2026-29955