CVE-2026-41906Public exploitNetwork attack vector

Cross-mailbox reassignment via unchecked customer email

Published May 7, 2026 · Updated May 7, 2026

Authorization bypass in FreeScout before 1.8.214 allows remote authenticated users to rebind conversations to hidden customers. The conversation_change_customer action trusts a supplied customer_email and updates a visible conversation without enforcing mailbox-scoped customer visibility. A low-privileged agent and APP_LIMIT_USER_CUSTOMER_VISIBILITY enabled are required; exploitation crosses mailbox boundaries and changes the conversation's customer association.

CVSS severity7.1
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in FreeScout before 1.8.214 allows remote authenticated users to rebind conversations to hidden customers. The conversation_change_customer action trusts a supplied customer_email and updates a visible conversation without enforcing mailbox-scoped customer visibility. A low-privileged agent and APP_LIMIT_USER_CUSTOMER_VISIBILITY enabled are required; exploitation crosses mailbox boundaries and changes the conversation's customer association.

The record

CVE
CVE-2026-41906
Published
May 7, 2026
Updated
May 7, 2026
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 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=< 1.8.214

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.214

Published CVSS scores

7.1GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-639Authorization Bypass Through User-Controlled Key
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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