CVE-2026-79766Termix: OS command injection in ACME/Let's Encrypt certificate-request handler via admin-controlled domain/email
Updated under an hour ago ()
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It affects Termix-SSH Termix. Add what you run to find out whether that includes you.
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Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. From 2.4.1 until 2.5.1, an authenticated Termix administrator can store attacker-controlled domain and email values through PATCH /users/acme-ssl-settings and trigger their interpolation into a certbot shell command through POST /users/acme-ssl-request. In src/backend/database/routes/acme-ssl-routes.ts, child_process.execSync invokes /bin/sh -c with those values only wrapped in double quotes, so shell metacharacters can execute arbitrary operating-system commands as the Termix backend process. Both HTTP webroot and DNS Cloudflare challenge modes are affected, and compromise exposes Termix databases, process secrets, stored credentials, and network reachability. This issue is fixed in version 2.5.1.
- CVSS
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-78
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Termix-SSH Termix termix_ssh:termix (from the name) | from 2.4.1, < 2.5.1 | CNA record |
References
- https://github.com/Termix-SSH/Termix/security/advisories/GHSA-pr55-25gf-5f9vx-refsource-confirm
- https://github.com/Termix-SSH/Termix/pull/1067x-refsource-misc
- https://github.com/Termix-SSH/Termix/commit/c7a9063a72071153723e668787548766c971f029x-refsource-misc
- https://github.com/Termix-SSH/Termix/commit/ddbdd5c437c2296607dfaa4265d6f63fbc1ca92ex-refsource-misc
- https://github.com/Termix-SSH/Termix/releases/tag/release-2.5.1-tagx-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.