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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.013 (70.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/openspug/spug/issues/741 (issue-tracking)
- github.com/openspug/spug (product)
- github.com/openspug/spug/blob/v3.4.0/spug_api/apps/monitor/executors.py (technical-description)
- github.com/openspug/spug/blob/v3.4.0/spug_api/apps/monitor/views.py (technical-description)
- github.com/openspug/spug/commit/97aebf133e1f9cbb35ccebadab1faedfdfe93f42 (patch)
- www.vulncheck.com/advisories/spug-through-3.4.0-remote-code-execution-via-ping-… (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.