runZero Platform user creation leak
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.
- Published
- Apr 7, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 23th percentile
- CWE
- CWE-863
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Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 27 / 40 · 6.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 6.8
- CNA · runZero
- 5.8
- 1.0 point gap
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| runzero | runzero platform | cpe:2.3:a:runzero:runzero_platform |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- runzero runzero platformbefore 4.0.260203.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (runZero). Independent of NVD's CPE analysis and usually ahead of it.
runZero Platform
- before 4.0.260203.0affected · semver
Same product
runzero: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-5373runZero Platform superuser privilege escalation33Monitor
- CVE-2026-5372runZero Platform SQL injection in saved queries25Monitor
- CVE-2026-5384runZero Platform incorrect credential scope23Monitor
- CVE-2026-5376runZero Platform session timeout failure23Monitor
- CVE-2026-5374runZero Platform MCP information leak23Monitor
- CVE-2026-5380runZero Platform cleartext secret exposure21Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| runZero Platform | 4.0.260203.0 | Vendor (CNA) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- runZerofinder
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-53740 days apartrunZero Platform MCP information leak23Monitor
- CVE-2026-53840 days apartrunZero Platform incorrect credential scope23Monitor
- CVE-2026-53800 days apartrunZero Platform cleartext secret exposure21Monitor
- CVE-2026-53830 days apartrunZero Explorer missing authorization check17Monitor
- CVE-2026-53790 days apartrunZero Platform MCP certification information leak12Monitor
- CVE-2026-53820 days apartrunZero Platform MCP endpoint information leak12Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- Administrator privileges are required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-863 · Incorrect AuthorizationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- help.runzero.com/docs/release-notes/#402602030
- www.runzero.com/advisories/runzero-platform-user-creation-leak-cve-2026-5378/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.