CVE-2026-42453
CVE-2026-42453 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: High (CVSS 4.0 base score 8.7)
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-28863
- Weakness: CWE-77
- Published:
- Last modified:
Description
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to version 2.1.0, the extractArchive and compressFiles endpoints in file-manager.ts use double-quoted strings for shell command construction, unlike all other file manager operations which use single-quote escaping. Double quotes allow $(command) substitution, enabling command injection on the remote SSH host. This issue has been patched in version 2.1.0.
Frequently asked questions
- What is CVE-2026-42453?
- Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to version 2.1.0, the extractArchive and compressFiles endpoints in file-manager.ts use double-quoted strings for shell command construction, unlike all other file manager operations which use single-quote escaping. Double quotes allow $(command) substitution, enabling command injection on the remote SSH host. This issue has been patched in version 2.1.0.
- How severe is CVE-2026-42453?
- CVE-2026-42453 has a CVSS 4.0 base score of 8.7, rated high severity.
- Is CVE-2026-42453 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-42453?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-42453 have an EU (EUVD) identifier?
- Yes. CVE-2026-42453 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28863.
- When was CVE-2026-42453 published?
- CVE-2026-42453 was published on 2026-05-08 and last updated on 2026-06-17.
References
- https://github.com/Termix-SSH/Termix/releases/tag/release-2.1.0-tag
- https://github.com/Termix-SSH/Termix/security/advisories/GHSA-rvg4-7vvq-9c2w
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