# CVE-2026-85013: Environment-modules: command injection in environment-modules bash completion via malicious module names containing shell metacharacters

CVE-2026-85013 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-85013, released September 12, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-85013
- Priority: High
- CVSS: 7.3 (Important)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 15, 2026
- Weakness: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85013

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | environment-modules RHEL 10 | 5.6.1-2.el10_2.1 | [RHSA-2026:80664](https://patchblox.com/security/data/fix/linux/rhsa-2026-80664.md) | Oct 13, 2026 |
| Linux | environment-modules RHEL 8 | 0:4.5.2-5.el8_10 | [RHSA-2026:82919](https://patchblox.com/security/data/fix/linux/rhsa-2026-82919.md) | Oct 16, 2026 |
| Linux | environment-modules RHEL 9 | 0:5.3.0-2.el9_8.1 | [RHSA-2026:84594](https://patchblox.com/security/data/fix/linux/rhsa-2026-84594.md) | Oct 19, 2026 |
| Linux | environment-modules almalinux 10 | 5.6.1-2.el10_2.1 | [ALSA-2026:80664](https://patchblox.com/security/data/fix/linux/alsa-2026-80664.md) | Nov 7, 2026 |
| Linux | environment-modules almalinux 8 | 4.5.2-5.el8_10 | [ALSA-2026:82919](https://patchblox.com/security/data/fix/linux/alsa-2026-82919.md) | Nov 7, 2026 |
| Linux | environment-modules almalinux 9 | 5.3.0-2.el9_8.1 | [ALSA-2026:84594](https://patchblox.com/security/data/fix/linux/alsa-2026-84594.md) | Nov 7, 2026 |
| Linux | environment-modules amzn 2023 | 4.8.0-1.amzn2023.0.3 | [ALAS2023-2026-3135](https://patchblox.com/security/data/fix/linux/alas2023-2026-3135.md) | Sep 28, 2026 |
| Linux | environment-modules ol 10 | 0:5.6.1-2.el10_2.1 | [ELSA-2026-80664](https://patchblox.com/security/data/fix/linux/elsa-2026-80664.md) | Nov 7, 2026 |
| Linux | environment-modules ol 8 | 0:4.5.2-5.el8_10 | [ELSA-2026-82919](https://patchblox.com/security/data/fix/linux/elsa-2026-82919.md) | Nov 7, 2026 |
| Linux | environment-modules ol 9 | 0:5.3.0-2.el9_8.1 | [ELSA-2026-84594](https://patchblox.com/security/data/fix/linux/elsa-2026-84594.md) | Nov 7, 2026 |
| Linux | environment-modules rocky 10 | 0:5.6.1-2.el10_2.1 | [RLSA-2026:80664](https://patchblox.com/security/data/fix/linux/rlsa-2026-80664.md) | Nov 7, 2026 |
| Linux | environment-modules rocky 8 | 0:4.5.2-5.el8_10 | [RLSA-2026:82919](https://patchblox.com/security/data/fix/linux/rlsa-2026-82919.md) | Nov 7, 2026 |
| Linux | environment-modules rocky 9 | 0:5.3.0-2.el9_8.1 | [RLSA-2026:84594](https://patchblox.com/security/data/fix/linux/rlsa-2026-84594.md) | Nov 7, 2026 |
| Linux | environment-modules-compat amzn 2023 | 4.8.0-1.amzn2023.0.3 | [ALAS2023-2026-3135](https://patchblox.com/security/data/fix/linux/alas2023-2026-3135.md) | Sep 28, 2026 |
| Linux | environment-modules-compat-debuginfo amzn 2023 | 4.8.0-1.amzn2023.0.3 | [ALAS2023-2026-3135](https://patchblox.com/security/data/fix/linux/alas2023-2026-3135.md) | Sep 28, 2026 |
| Linux | environment-modules-debuginfo amzn 2023 | 4.8.0-1.amzn2023.0.3 | [ALAS2023-2026-3135](https://patchblox.com/security/data/fix/linux/alas2023-2026-3135.md) | Sep 28, 2026 |
| Linux | environment-modules-debugsource amzn 2023 | 4.8.0-1.amzn2023.0.3 | [ALAS2023-2026-3135](https://patchblox.com/security/data/fix/linux/alas2023-2026-3135.md) | Sep 28, 2026 |
| Linux | modules Debian 14 | 5.6.1-3 | [DEBIAN-CVE-2026-85013](https://patchblox.com/security/data/fix/linux/debian-cve-2026-85013.md) | Sep 12, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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