What is CVE-2026-87820?

CVE-2026-87820 is a medium-severity vulnerability in Usmannasir Cyberpanel, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-09-09.

How severe is CVE-2026-87820?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Usmannasir Cyberpanel

CVE-2026-87820

CyberPanel versions 2.4.3 through 2.4.5 expose unauthenticated AI Scanner debugging endpoints that disclose administrator usernames, API-key prefixes, scan identifiers, target domains, and account metadata. Unauthenticated attackers can enumerate panel administrators and recent scanner activity to inventory multi-tenant installations and facilitate follow-on attacks.

Vulnerability class: Information Disclosure

Published 2026-09-09 · last modified 2026-09-14.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.6th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Usmannasir Cyberpanel

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/usmannasir/cyberpanel/security/advisories/GHSA-qmwq-9cc8-x6h2 (vendor-advisory)
github.com/usmannasir/cyberpanel/commit/20484fd1786a424054386e5d6290d66b47cab3a3 (patch)
www.vulncheck.com/advisories/cyberpanel-2.4.3-through-2.4.5-information-disclos… (third-party-advisory)

Frequently asked questions

What is CVE-2026-87820?: CVE-2026-87820 is a medium-severity vulnerability in Usmannasir Cyberpanel, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-09-09.
How severe is CVE-2026-87820?: Medium severity. CVSS v3 base score is 5.3 out of 10.