CVE-2026-40591Disclosure

LOWCVSS 7.1 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the phone-conversation creation flow accepts attacker-controlled `customer_id`, `name`, `to_email`, and `phone` values and resolves the target customer in the backend without enforcing mailbox-scoped customer visibility. As a result, a low-privileged agent who can create a phone conversation in Mailbox A can bind the new Mailbox A phone conversation to a hidden customer from Mailbox B and add a new alias email to that hidden customer record by supplying `to_email`. Version 1.8.214 fixes the vulnerability.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-639

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 1 classified signal
General: 1 classified signal
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification2 categories

Disclosure

150.0%

General

150.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

CVE@CVEnew163d
General
CVE-2026-40591 FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the phone-conversation creation flow accepts attacker-controlled `customer_id`… https://www.cve.org/CVERecord?id=CVE-2026-40591
Post summary
The post references CVE-2026-40591, noting a flaw in FreeScout's phone-conversation creation flow that accepts attacker-controlled `customer_id`, but provides no further details on exploitation, mitigation, or evidence of active attacks.
00010170
57.3K followersView on X
Infoflowcloud@infoflowcloud163d
Disclosure
🚨*CVE* CVE-2026-40591 FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the phone-conversation creation flow accepts attacker-controlled `customer_id`… https://www.cve.org/CVERecord?id=CVE-2026-40591 ----- Traducción: CVE-2026-40591 Fre… http://infoflow.cloud`
Post summary
A new CVE (CVE-2026-40591) has been disclosed for FreeScout, where the phone-conversation creation flow accepts an attacker-controlled `customer_id` prior to version 1.8.214; no PoC, exploit, or patch information is provided.
0000042
72 followersView on X

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