Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M
CVE-2026-53542Termix: Tar option injection in file-manager archive creation allows command execution on managed SSH hosts
High 8.8
In plain English
A high-severity OS command injection in Termix from Termix-SSH. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).
Official description
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to 2.3.2, the archive creation endpoint in src/backend/ssh/file-manager.ts passes selected file basenames to tar without an end-of-options marker and without making the operands unambiguously relative. A user with access to an SSH file-manager session can select basenames beginning with GNU tar options such as --checkpoint=1 and --checkpoint-action=exec, causing tar, tar.gz, tar.bz2, or tar.xz creation to interpret those names as options. The resulting checkpoint action executes commands on the managed SSH host with the privileges of the connected SSH account, allowing file disclosure, modification, and service disruption. This issue is fixed in version 2.3.2.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Termix-SSH | Termix | < 2.3.2 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/Termix-SSH/Termix/security/advisories/GHSA-rwj6-6vh7-45pv x_refsource_CONFIRM
- https://github.com/Termix-SSH/Termix/pull/874 x_refsource_MISC
- https://github.com/Termix-SSH/Termix/commit/52f4e51ae03b5b8d2608e1383e2ccf79d290132b x_refsource_MISC
- https://github.com/Termix-SSH/Termix/releases/tag/release-2.3.2-tag x_refsource_MISC