CVE-2026-40589: freescout · Insecure Direct Object Reference
Affects freescoutSource CVE Database V5
Not known to be exploited · CVSS 7.6 High : upgrade to 1.8.214 soon.
Data as of 29 Oct 2026, 19:04 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.8.214
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:LExploitation evidence
Disclosed: evidence found.
CVE published 21 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade freescout and freescout-help-desk/freescout to 1.8.214.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| freescout-help-deskfreescout | Affected
| Fixed in
|
GitHubfreescout-help-desk/freescoutpkg:github/freescout-help-desk/freescoutOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade FreeScout to version 1.8.214 or later, where this vulnerability is fixed. Since the vendor has released a fixed version, applying this official update is the recommended remediation. Patch status is confirmed by the version information in the description. No additional mitigation steps are indicated.
Description
FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.