CVE-2026-27180: MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated remote code execution through supply ch

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2026-27180 is a critical-severity flaw (CVSS 9.8) affecting majordomo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated remote code execution through supply chain compromise via update URL poisoning. The saverestore module exposes its admin() method through the /objects/?module=saverestore endpoint without authentication because it uses gr('mode') (which reads directly from $_REQUEST) instead of the framework's $this->mode. An attacker can poison the system update URL via the auto_update_settin

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
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	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-494
Published	2026-02-18
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: mjdm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-18 22:16 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

mjdm majordomo MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy majordomo || rpm -q majordomo || majordomo --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · intel-ipsec-mb · FIXED · 3.0.1-1.eln159 · FEDORA-2026-ca01077210 · source

sudo dnf upgrade --advisory=FEDORA-2026-ca01077210

Fedora 46 · complytime-providers · FIXED · 0.3.0-2.fc46 · FEDORA-2026-7c372be466 · source

sudo dnf upgrade --advisory=FEDORA-2026-7c372be466

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: mbanyamer/CVE-2026-27180-MajorDoMo-unauthenticated-RCE (0 stars)
Write-up: chocapikk.com/posts/2026/majordomo-revisited/
Write-up: github.com/sergejey/majordomo/pull/1177
Metasploit: MajorDoMo Supply Chain RCE via Update Poisoning

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-2026-27180?

majordomo: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-27180 being exploited?

CVE-2026-27180 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-2026-27180 affect?

CVE-2026-27180 affects majordomo. Severity is critical (CVSS 9.8). MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated remote code execution through supply chain compromise via update URL poisoning. The saverestore module exposes its admin() method through the /objects/?module=saverestor

How urgent is CVE-2026-27180?

Priority 64/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-27181 HIGH 7.5 MITIGATE MajorDoMo (aka Major Domestic Module) allows unauthenticated arbitrary module uninstallation through the marke
CVE-2026-27179 HIGH 8.2 MITIGATE MajorDoMo (aka Major Domestic Module) contains an unauthenticated SQL injection vulnerability in the commands
CVE-2026-27178 HIGH 7.2 MITIGATE MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability through metho
CVE-2026-27177 HIGH 7.2 MITIGATE MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability via the /obje
CVE-2026-27176 MEDIUM 6.1 MITIGATE MajorDoMo (aka Major Domestic Module) contains a reflected cross-site scripting (XSS) vulnerability in command

References

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