CVE-2026-38820

HIGH8.3

Published 2026-08-28 · Source cve@mitre.org

Description

openNDS before 11.0.0 is susceptible to unauthenticated OS command execution via shell command injection through the fas query parameter on the /opennds_preauth/ endpoint because of libopennds.sh.

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

CWE-78

References

https://github.com/openNDS/openNDS/commit/8c03750d9a17d601fa7bd03ae7cde20c7c8d1252

View on NVD

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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.
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CVE-2026-38821
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