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CVE-2026-5382· NVD / CVE Program· CNA runZero

runZero Platform MCP endpoint information leak

An issue that could expose records outside of the authorized organization scope through the MCP endpoints 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:L/I:N/A:N (3.0 Low). This issue was fixed in version 4.0.260206.0 of the runZero Platform.

LowCVSS 3.0 · v3.1—No exploit Fix available

Noroxi analysis

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Published
Apr 7, 2026
Updated
Jun 17, 2026
EPSS
0.3% · 17th percentile
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Report tools

JSON

Action score

12

Monitor

Low priority for now.

CVSS
12 / 40 · 3.0 / 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
—
CNA · runZero
3.0
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
runzerorunzero 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 4.0.260206.0

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 4.0.260206.0affected · semver

Same product

runzero: all records

Other highest-scoring records for the same primary product.

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
runZero Platform4.0.260206.0Vendor (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.

EPSS, last 120 days

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 researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-53780 days apartrunZero Platform user creation leak
    27Monitor
  • CVE-2026-53740 days apartrunZero Platform MCP information leak
    23Monitor
  • CVE-2026-53840 days apartrunZero Platform incorrect credential scope
    23Monitor
  • CVE-2026-53800 days apartrunZero Platform cleartext secret exposure
    21Monitor
  • CVE-2026-53830 days apartrunZero Explorer missing authorization check
    17Monitor
  • CVE-2026-53790 days apartrunZero Platform MCP certification information leak
    12Monitor

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.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
Low
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-863 · Incorrect Authorization

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N

nvd-secondary

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

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records