CVE-2026-41228: Froxlor is open source server administration software

Q: How do I fix CVE-2026-41228?

froxlor: upgrade to 2.3.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-41228 being exploited?

CVE-2026-41228 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41228 affect?

CVE-2026-41228 affects froxlor. Severity is critical (CVSS 9.9). Froxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does not validate the `def_language` parameter against the list of available language files. An

Q: How urgent is CVE-2026-41228?

Priority 51/100. Critical severity; Public exploit reference

This month

CRITICAL 9.9UPGRADE

CVE-2026-41228 is a critical-severity flaw (CVSS 9.9) affecting froxlor. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Froxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does not validate the `def_language` parameter against the list of available language files. An authenticated customer can set `def_language` to a path traversal payload (e.g., `../../../../../var/customers/webs/customer1/evil`), which is stored in the database. On subsequent requests, `Language::loadLan

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-98
Published	2026-04-23
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: froxlor

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-23 04:16 UTCPublished CVE record published
2026-06-17 10:46 UTCUpdated Record last modified

froxlor froxlor UPGRADE

Affected: < 2.3.6

Fixed in: 2.3.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy froxlor || rpm -q froxlor || froxlor --version

2. UPGRADE to 2.3.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade froxlor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade froxlor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41228?

froxlor: upgrade to 2.3.6. Exact commands for each OS are on this page.

Is CVE-2026-41228 being exploited?

CVE-2026-41228 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41228 affect?

CVE-2026-41228 affects froxlor. Severity is critical (CVSS 9.9). Froxlor is open source server administration software. Prior to version 2.3.6, the Froxlor API endpoint `Customers.update` (and `Admins.update`) does not validate the `def_language` parameter against the list of available language files. An

How urgent is CVE-2026-41228?

Priority 51/100. Critical severity; Public exploit reference

Related CVEs

CVE-2026-41233 MEDIUM 5.4 UPGRADE Froxlor is open source server administration software
CVE-2026-41232 MEDIUM 5.0 UPGRADE Froxlor is open source server administration software
CVE-2026-41231 HIGH 7.5 UPGRADE Froxlor is open source server administration software
CVE-2026-41230 HIGH 8.5 UPGRADE Froxlor is open source server administration software
CVE-2026-41229 CRITICAL 9.1 UPGRADE Froxlor is open source server administration software

References

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