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CVE-2026-41237 froxlor CVE debrief

A vulnerability was discovered in Froxlor, an open-source server administration software. The issue, tracked as CVE-2026-41237, affects version 2.3.6 and earlier. The vulnerability arises from the LOC record regex using `s+`, which matches newlines, allowing embedded newlines to pass. Additionally, TLSA `matching=0` has no upper bound on hex data length, and all validators return raw input without zone-file escaping. This vulnerability has a CVSS score of 8.6 and is classified as HIGH severity. The issue was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-41237) on 2026-06-04T19:16:29.503Z and modified on 2026-06-05T20:17:31.417Z. For more information, refer to the [NVD detail page](https://nvd.nist.gov/vuln/detail/CVE-2026-41237). The vulnerability was patched in version 2.3.7. Refer to [ref-4](https://github.com/froxlor/froxlor/commit/b34829262dc3), [ref-5](https://github.com/froxlor/froxlor/releases/tag/2.3.7), and [ref-6](https://github.com/froxlor/froxlor/security/advisories/GHSA-j6fm-9rfm-j5hx) for more details.

Vendor
froxlor
Product
Unknown
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Administrators and users of Froxlor server administration software version 2.3.6 and earlier should be aware of this vulnerability and take necessary actions to upgrade to version 2.3.7 or apply patches.

Technical summary

The LOC record regex in Froxlor version 2.3.6 and earlier uses `s+`, which matches newlines, allowing embedded newlines to pass. TLSA `matching=0` has no upper bound on hex data length, and all validators return raw input without zone-file escaping.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Froxlor version 2.3.7 or later.
  • Apply patches as described in [ref-4](https://github.com/froxlor/froxlor/commit/b34829262dc3).
  • Review and update configurations according to best practices.

Evidence notes

The vulnerability has a CVSS score of 8.6 and is classified as HIGH severity. The issue was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-41237) on 2026-06-04T19:16:29.503Z and modified on 2026-06-05T20:17:31.417Z.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41237 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41237

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41237 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41237

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.