CVE-2026-85013
Environment-modules: command injection in environment-modules bash completion via malicious module names containing shell metacharacters
A flaw was found in environment-modules. A local attacker can exploit this vulnerability by placing a maliciously named modulefile in a location visible to the victim's `MODULEPATH`. When the victim uses Bash completion for `module` or `ml` commands, the malicious module name, containing shell metacharacters, is evaluated as a command. This can lead to arbitrary command execution in the completing user's shell, impacting their confidentiality, integrity, and availability.
Fixes and workarounds
Workaround
To mitigate this issue, avoid enabling Bash completion for `module` and `ml` in environments where untrusted users can influence `MODULEPATH`. Additionally, ensure that shared module search paths do not include attacker-writable directories. As a practical measure, the affected completion script can be removed or disabled by commenting out its sourcing in shell configuration files (e.g., `~/.bashrc` or `/etc/profile.d/`). Users must start a new shell session for changes to take effect.
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Enterprise Linux 10 Red Hat environment-modules
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:5.6.1-2.el10_2.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat environment-modules
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:4.5.2-5.el8_10; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat environment-modules
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:5.3.0-2.el9_8.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Hardened Images Red Hat environment-modules-main
https://catalog.redhat.com/software/containers/ |
≥ 5.6.2-1.hum1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat environment-modules
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: unknown |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat environment-modules
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.3 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H | CNA: redhat |
Exploit evidence
- https://github.com/envmodules/modules/security/advisories/GHSA-8hrw-p88g-qhmg
exploit · ADP: CISA-ADP
References
- https://access.redhat.com/errata/RHSA-2026:64766CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:80664CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:82919CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:84594CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-85013CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2465635CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://github.com/envmodules/modules/security/advisories/GHSA-8hrw-p88g-qhmgCNA: redhat
- https://github.com/envmodules/modules/security/advisories/GHSA-8hrw-p88g-qhmgADP: CISA-ADP · exploit
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