CVE-2026-41230Public exploitNetwork attack vector

DNS record manipulation via unfiltered newlines

Published Apr 23, 2026 · Updated Apr 23, 2026

DNS zone file injection in Froxlor before 2.3.6 allows remote authenticated users to alter DNS records through the DomainZones.add API. DomainZones.add accepts unlisted record types and preserves embedded newlines, which DnsEntry.__toString writes directly into a BIND zone file. Customer credentials and DNS-editing access are required; injected records can redirect traffic or alter mail policy, while malformed directives can prevent the affected zone from loading.

CVSS severity8.5
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DNS zone file injection in Froxlor before 2.3.6 allows remote authenticated users to alter DNS records through the DomainZones.add API. DomainZones.add accepts unlisted record types and preserves embedded newlines, which DnsEntry.__toString writes directly into a BIND zone file. Customer credentials and DNS-editing access are required; injected records can redirect traffic or alter mail policy, while malformed directives can prevent the affected zone from loading.

The record

CVE
CVE-2026-41230
Published
Apr 23, 2026
Updated
Apr 23, 2026
Vendor
Froxlor
Product
Froxlor
Classifications
CWE-93, CAPEC-81, CAPEC-15, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.3.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Froxlor · Froxlorversion=< 2.3.6

Published CVSS scores

8.5GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')
CAPEC-81Web Server Logs Tampering
CAPEC-15Command Delimiters
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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