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Vulnerability record · CVE-2026-38822 · published 28 August 2026

CVE-2026-38822: OS command injection vulnerability

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.

7.6 CVSS 3.1 High EPSS 2.3% · top 17.6% CWE-78 · OS command injection Deferred
7.6CVSS 3.1 base score
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
9 Sep 2026Last modified by NVD

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.

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

References

LinkTags
https://github.com/openNDS/openNDS/commit/294983e859bb678eef7db06fc9f6afab0b489d8e

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Source: NIST National Vulnerability Database (record CVE-2026-38822), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.