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TI-2026-21988 Aliases CVE-2026-27602GHSA-wwv8-cqpr-vx3m

Modoboa has an OS Command Injection

Priority HIGH 67CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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 it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00576 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed modoboa (modoboa): 2.7.1modoboa (PyPI): 2.7.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
modoboamodoboabefore 2.7.12.7.1Patch availableCNA
—modoboa (PyPI)before 2.7.12.7.1Patch availableGHSA-wwv8-cqpr-vx3m
  • modoboa Vendormodoboa Affected before 2.7.1 Fixed in 2.7.1 Patch available CNA
  • modoboa (PyPI) Vendor— Affected before 2.7.1 Fixed in 2.7.1 Patch available GHSA-wwv8-cqpr-vx3m

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:modoboa:modoboa:*:*:*:*:*:*:*:*before 2.7.1Vulnerablemodoboa
  • cpe:2.3:a:modoboa:modoboa:*:*:*:*:*:*:*:* Versions before 2.7.1 Vulnerable ·modoboa

Remediation

  • Fix · CNA modoboa (modoboa) Fixed in 2.7.1
  • Fix · GHSA-wwv8-cqpr-vx3m modoboa (PyPI) Fixed in 2.7.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27602
  2. 2026-10-03 Alias added: GHSA-wwv8-cqpr-vx3m
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2023-02089 Improper Authorization in modoboa/modoboa CVSS 3.1CRITICAL 9.1
  • TI-2023-05233 Cross-Site Request Forgery (CSRF) in modoboa/modoboa CVSS 3.1HIGH 8.8
  • TI-2023-02028 Weak Password Requirements in modoboa/modoboa CVSS 3.1CRITICAL 9.8
  • TI-2023-00737 Authentication Bypass by Primary Weakness in modoboa/modoboa CVSS 3.1CRITICAL 9.8
  • TI-2023-05231 Cross-site Scripting (XSS) - DOM in modoboa/modoboa CVSS 3.1MEDIUM 5.4
  • TI-2023-02090 Cross-Site Request Forgery (CSRF) in modoboa/modoboa CVSS 3.1MEDIUM 6.8
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences