How severe is CVE-2026-26279?

CVE-2026-26279 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-26279 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26279?

CVE-2026-26279 affects Froxlor. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26279?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-26279 have an EU (EUVD) identifier?

Yes. CVE-2026-26279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9340.

When was CVE-2026-26279 published?

CVE-2026-26279 was published on 2026-03-03 and last updated on 2026-06-17.

CVE-2026-26279

CVE-2026-26279 is a critical-severity vulnerability in Froxlor with a CVSS 3.x base score of 9.1. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9340
Weakness: CWE-78
Affected product: Froxlor
Published: 2026-03-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-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 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.
How severe is CVE-2026-26279?: CVE-2026-26279 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-26279 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26279?: CVE-2026-26279 affects Froxlor. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26279?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-26279 have an EU (EUVD) identifier?: Yes. CVE-2026-26279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9340.
When was CVE-2026-26279 published?: CVE-2026-26279 was published on 2026-03-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:froxlor:froxlor:*:*:*:*:*:*:*:*

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