Skip to main content
HIGH

CVE-2026-38822

OS Command Injection via HTTP GET Parameter Name in openNDS Client Status Page

CVSS v3

7.6

HIGH

EPSS Score

2.3 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

In openNDS before 11.0.0, the client_params.sh script, invoked by the openNDS daemon to serve the authenticated client status page, is vulnerable to OS command injection through crafted HTTP GET query parameter keys. An authenticated captive portal user can inject arbitrary shell commands by embedding semicolons in a URL query parameter name.

Technical details

Published
2026-08-28
Last Modified
2026-08-28

Frequently asked questions

What is CVE-2026-38822?

In openNDS before 11.0.0, the client_params.sh script, invoked by the openNDS daemon to serve the authenticated client status page, is vulnerable to OS command injection through crafted HTTP GET query parameter keys. An authenticated captive portal user can inject arbitrary shell commands by embedding semicolons in a URL query parameter name.

Is CVE-2026-38822 actively exploited?

Active exploitation of CVE-2026-38822 has not been confirmed. Its EPSS score was 2.3% on 2026-09-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-38822?

CVE-2026-38822 has a CVSS v3 base score of 7.6 (HIGH severity).

Is CVE-2026-38822 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

Check an IPSearch CVEsSIEM & TIP integrations

No credit card required · 500 free checks/month · Free API key

Other 2026 vulnerabilities worth triaging

Ranked by exploit probability (EPSS).

Back to CVE Database