Regex Vulnerability in Froxlor Server Administration Software
CVE-2026-41237

8.6HIGH

Key Information:

Vendor

Froxlor

Status
Froxlor
Vendor
CVE Published:
4 June 2026

What is CVE-2026-41237?

Froxlor, an open-source server administration software, is affected by input validation issues due to improper regular expression handling in versions 2.3.6 and earlier. The regex pattern allows for embedded newlines, potentially leading to unexpected behavior. Additionally, the TLSA 'matchingType=0' lacks upper limits on hex data length, which could further expose systems. Furthermore, the software does not adequately escape zone-file inputs, resulting in raw input being returned by the validators. Version 2.3.7 addresses these vulnerabilities with important updates and patches.

Affected Version(s)

froxlor < 2.3.7

References

https://github.com/froxlor/froxlor/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/froxlor/froxlor/commit/b34829262dc3
x_refsource_MISC
https://github.com/froxlor/froxlor/releases/tag/2.3.7
x_refsource_MISC

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.