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Vulnerabilities

Vulnerability · CVE-2026-26279

Froxlor is open source server administration software.

Published Mar 3, 2026 · catalog updated Jun 17, 2026 · Froxlor is open source

Check if you run it

No confirmed exploitation is on record for CVE-2026-26279. EPSS is 1.15%. Act only if a listed version of Froxlor is open source is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Froxlor is open source).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.15%
Remediation
Advisory link
Affected products
cpe froxlor/froxlor

Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strings in the panel.adminmail setting. This value is later concatenated into a shell command executed as root by a cron job, where the pipe character | is explicitly whitelisted. The result is full root-level Remote Code Execution. This vulnerability is fixed in 2.3.4.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe froxlor/froxlorversion unspecified

How to fix CVE-2026-26279

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-26279. EPSS is 1.15%. Act only if a listed version of Froxlor is open source is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-482; CWE-78: OS Command Injection. EPSS 1.15%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 3, 2026 · NIST NVD

    Detected

    Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strings in the panel.adminmail setting. This value is later concatenated into a shell command executed as root by a cron job,

  2. Jun 17, 2026 · NIST NVD

    Updated

    Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strings in the panel.adminmail setting. This value is later concatenated into a shell command executed as root by a cron job,

Sources

  • CVE.orgVulnerability recordCVE-2026-26279

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26279

    30-day exploitation probability 1.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-26279

    Froxlor is open source server administration software. Prior to 2.3.4, a typo in Froxlor's input validation code (== instead of =) completely disables email format checking for all settings fields declared as email type. This allows an authenticated admin to store arbitrary strin

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.