Raw vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HSummary
CVE-2026-27602 is a high-severity OS Command Injection (CWE-78) vulnerability in Modoboa Modoboa. Its CVSS base score is 7.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked at the 44th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2026-27602 is a command injection vulnerability in Modoboa, an open-source mail hosting and management platform. The issue resides in the `exec_cmd()` function within `modoboa/lib/sysutils.py`, which executes subprocess calls with `shell=True` without sanitizing domain names that are directly incorporated into shell command strings. This affects all versions of Modoboa prior to 2.7.1 and is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), with a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).
A Reseller or SuperAdmin user with network access to the Modoboa instance can exploit this vulnerability by injecting shell metacharacters into a domain name field. Successful exploitation allows the attacker to execute arbitrary operating system commands on the server, potentially leading to high-impact confidentiality, integrity, and availability compromises, such as data exfiltration, modification, or server takeover.
Mitigation is available in Modoboa version 2.7.1, which patches the vulnerability by addressing the unsanitized domain name handling in shell commands. Official advisories and resources, including the GitHub security advisory (GHSA-wwv8-cqpr-vx3m), release notes for v2.7.1, and the specific commit (27a7aa133d3608fe8c25ae39125d1012c333cbfa), detail the fix and recommend immediate upgrading.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-15951
Vulnerability Data
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…
more
metacharacters in a domain name to run arbitrary OS commands on the server. Version 2.7.1 patches the issue.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
—
—
—
V1.2.5V1.2.8V15.2.5
Mitigating Controls (NIST 800-53 r5) AI
Developer testing and evaluation can discover missing or incorrect command sanitization during development.
Input validation directly neutralizes or rejects special characters that would otherwise alter OS command structure.
Least privilege reduces the permissions available to any process that could be subverted by injected commands.
Least functionality restricts available OS commands and interpreters, limiting the blast radius of injection.
Secure engineering principles require proper neutralization of untrusted input before command construction.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.
Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.