CVE-2026-5379: An issue that allowed MCP agents to access certificate information from outside of their authorized organizati

Q: How do I fix CVE-2026-5379?

runzero platform: upgrade to 4.0.260203.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-5379 being exploited?

CVE-2026-5379 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-5379 affect?

CVE-2026-5379 affects runzero platform. Severity is low (CVSS 3.0). An issue that allowed MCP agents to access certificate information from 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/A

Q: How urgent is CVE-2026-5379?

Priority 11/100. No elevated risk signals yet.

Routine

LOW 3.0UPGRADE

CVE-2026-5379 is a low-severity flaw (CVSS 3.0) affecting runzero platform. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue that allowed MCP agents to access certificate information from 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:L/I:N/A:N (3.0 Low). This issue was fixed in version 4.0.260203.0 of the runZero Platform.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.0 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-04-07
Last modified	2026-10-25

Publisher (CNA): runZero · Vendor: runzero

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-07 15:17 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

runzero runzero platform UPGRADE

Affected: < 4.0.260203.0

Fixed in: 4.0.260203.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy runzero-platform || rpm -q runzero-platform || runzero-platform --version

2. UPGRADE to 4.0.260203.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade runzero-platform

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade runzero-platform

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5379?

runzero platform: upgrade to 4.0.260203.0. Exact commands for each OS are on this page.

Is CVE-2026-5379 being exploited?

CVE-2026-5379 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5379 affect?

CVE-2026-5379 affects runzero platform. Severity is low (CVSS 3.0). An issue that allowed MCP agents to access certificate information from 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/A

How urgent is CVE-2026-5379?

Priority 11/100. No elevated risk signals yet.

References

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