RCE in Cym1102 Nginxwebui
CVE-2026-90581
A vulnerability was determined in cym1102 nginxWebUI up to 4.4.2. This issue affects the function MainController.autoUpdate of the file /adminPage/main/autoUpdate. This manipulation of the argument url causes code injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Cym1102 Nginxwebui — versions 4.4.0, 4.4.1, 4.4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/403166 (technical-description, vdb-entry)
- vuldb.com/vuln/403166/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90581 (third-party-advisory)
- vuldb.com/submit/913328 (third-party-advisory)
- github.com/cym1102/nginxWebUI/issues/213 (issue-tracking, exploit)
- github.com/cym1102/nginxWebUI/pull/215 (issue-tracking, patch)
- github.com/cym1102/nginxWebUI/ (product)
Frequently asked questions
- What is CVE-2026-90581?
- CVE-2026-90581 is a medium-severity vulnerability in Cym1102 Nginxwebui, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-09-13.
- How severe is CVE-2026-90581?
- Medium severity. CVSS v3 base score is 6.3 out of 10.