CVE-2026-27602: Modoboa is a mail hosting and management platform

Q: How do I fix CVE-2026-27602?

modoboa: upgrade to 2.7.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-27602 being exploited?

CVE-2026-27602 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-2026-27602 affect?

CVE-2026-27602 affects modoboa. Severity is high (CVSS 7.2). Modoboa is a mail hosting and management platform. Prior to version 2.7.1, `exec_cmd()` in `modoboa/lib/sysutils.py` always runs subprocess calls with `shell=True`. Since domain names flow directly into shell command strings without any san

Q: How urgent is CVE-2026-27602?

Priority 42/100. High severity; Public exploit reference

This month

HIGH 7.2UPGRADE

CVE-2026-27602 is a high-severity flaw (CVSS 7.2) affecting modoboa. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Modoboa is a mail hosting and management platform. Prior to version 2.7.1, `exec_cmd()` in `modoboa/lib/sysutils.py` always runs subprocess calls with `shell=True`. Since domain names flow directly into shell command strings without any sanitization, a Reseller or SuperAdmin can include shell metacharacters in a domain name to run arbitrary OS commands on the server. Version 2.7.1 patches the issue.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-03-25
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: modoboa

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

Am I affected?

Timeline

2026-03-25 19:16 UTCPublished CVE record published
2026-06-17 10:27 UTCUpdated Record last modified

modoboa modoboa UPGRADE

Affected: < 2.7.1

Fixed in: 2.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.7.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade modoboa

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade modoboa

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-2026-27602?

modoboa: upgrade to 2.7.1. Exact commands for each OS are on this page.

Is CVE-2026-27602 being exploited?

CVE-2026-27602 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-2026-27602 affect?

CVE-2026-27602 affects modoboa. Severity is high (CVSS 7.2). Modoboa is a mail hosting and management platform. Prior to version 2.7.1, `exec_cmd()` in `modoboa/lib/sysutils.py` always runs subprocess calls with `shell=True`. Since domain names flow directly into shell command strings without any san

How urgent is CVE-2026-27602?

Priority 42/100. High severity; Public exploit reference

References

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