What is CVE-2026-90770?

CVE-2026-90770 is a high-severity vulnerability in Openspug Spug, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-09-13.

How severe is CVE-2026-90770?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Openspug Spug

CVE-2026-90770

Spug through 3.4.0 contains a remote code execution vulnerability in the ping_check function that interpolates user-supplied monitor addresses directly into shell commands without validation. Authenticated users with monitor permissions can inject shell metacharacters via the /monitor/run_test/ endpoint to execute arbitrary commands as the Spug process user.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Openspug Spug

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-90770?: CVE-2026-90770 is a high-severity vulnerability in Openspug Spug, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-09-13.
How severe is CVE-2026-90770?: High severity. CVSS v3 base score is 8.8 out of 10.