CVE-2026-5378 — runZero Platform user creation leak

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MEDIUM

runZero Platform user creation leak

Published Apr 7, 2026

6.8

MEDIUM

CVSS 3.1

EPSS 0.32%

Description

An issue that allowed administrators to create and update users outside of their 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:H/A:N (5.8 Medium). This issue was fixed in version 4.0.260203.0 of the runZero Platform.

Affected products

Vendor runZero Product Platform Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <4.0.260203.0

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

runZero

Platform

unaffected

Version	Status	Constraints
0	affected	<4.0.260203.0

Remediation

Vendor solution

This issue was fixed in version 4.0.260203.0 of the runZero Platform

Metrics

0.32% 0.00322

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.

EPSS probability 0.00322

Score over time

Apr–Oct 2026

EPSS v4
EPSS v5

Percentile over time

EPSS v4
EPSS v5

Table of values (3 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 2, 2026	0.32% (0.00322)	22.92th	v5 (v2026.06.15)
Jun 15, 2026	0.19% (0.00191)	8.89th	v5 (v2026.06.15)
Apr 8, 2026	0.02% (0.00024)	6.64th	v4 (v2025.03.14)

Weaknesses (1)

CWE-863

Incorrect Authorization

References (2)

https://help.runzero.com/docs/release-notes/#402602030
release-notesRelease Notes
https://www.runzero.com/advisories/runzero-platform-user-creation-leak-cve-2026-5378/
vendor-advisoryVendor Advisory

Link	Providers	Tags
https://help.runzero.com/docs/release-notes/#402602030		release-notesRelease Notes
https://www.runzero.com/advisories/runzero-platform-user-creation-leak-cve-2026-5378/		vendor-advisoryVendor Advisory