CVE-2026-85428: MOOS core-moos through 10.4.0 contains an authentication bypass vulnerability in the optional MOOSDB HTTP serv

Q: How do I fix CVE-2026-85428?

core-moos: upgrade to newer than 10.4.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-85428 being exploited?

CVE-2026-85428 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-2026-85428 affect?

CVE-2026-85428 affects core-moos. Severity is critical (CVSS 9.8). MOOS core-moos through 10.4.0 contains an authentication bypass vulnerability in the optional MOOSDB HTTP server that allows unauthenticated clients to write variables. Attackers can send HTTP requests with variable names and values to the

Q: How urgent is CVE-2026-85428?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-85428 is a critical-severity flaw (CVSS 9.8) affecting core-moos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MOOS core-moos through 10.4.0 contains an authentication bypass vulnerability in the optional MOOSDB HTTP server that allows unauthenticated clients to write variables. Attackers can send HTTP requests with variable names and values to the MOOSDB HTTP server port to modify MOOS variables including actuator and override commands without authentication.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-09-03
Last modified	2026-10-14

Publisher (CNA): VulnCheck · Vendor: themoos

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-03 23:17 UTCPublished CVE record published
2026-10-14 15:07 UTCUpdated Record last modified

themoos core-moos UPGRADE

Affected: <= 10.4.0

Fixed in: newer than 10.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy core-moos || rpm -q core-moos || core-moos --version

2. UPGRADE to newer than 10.4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade core-moos

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade core-moos

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-2026-85428?

core-moos: upgrade to newer than 10.4.0. Exact commands for each OS are on this page.

Is CVE-2026-85428 being exploited?

CVE-2026-85428 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-2026-85428 affect?

CVE-2026-85428 affects core-moos. Severity is critical (CVSS 9.8). MOOS core-moos through 10.4.0 contains an authentication bypass vulnerability in the optional MOOSDB HTTP server that allows unauthenticated clients to write variables. Attackers can send HTTP requests with variable names and values to the

How urgent is CVE-2026-85428?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

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References

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