What is CVE-2026-5383?

CVE-2026-5383 is a medium-severity vulnerability in Runzero Explorer, classified under Incorrect Authorization. CVSS score: 4.4/10. Published 2026-04-07.

How severe is CVE-2026-5383?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Auth bypass in Runzero Explorer

CVE-2026-5383

An issue that could allow access to Explorer groups from outside of the authorized organization scope has been resolved. This is an instance of CWE-863: Incorrect Authorization, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L (4.4 Medium). This issue was fixed in version 4.0.260208.0 of the runZero Explorer.

Vulnerability class: Broken Access Control

Published 2026-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (18.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Runzero Explorer — versions 0
Runzero Platform

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

44488dab-36db-4358-99f9-bc116477f914 (release-notes, Release Notes)
44488dab-36db-4358-99f9-bc116477f914 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-5383?: CVE-2026-5383 is a medium-severity vulnerability in Runzero Explorer, classified under Incorrect Authorization. CVSS score: 4.4/10. Published 2026-04-07.
How severe is CVE-2026-5383?: Medium severity. CVSS v3 base score is 4.4 out of 10.