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CVE

CVE-2026-41902

FreeScout's user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks
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CVE

CVE-2026-41902

FreeScout's user invitation hash never expires: permanent unauthenticated account takeover if invite link leaks

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.217, the /user-setup/{hash} endpoint accepts a 60-character random invite_hash to set a new user's password. The endpoint performs no expiration check — the hash remains valid indefinitely until consumed. Combined with realistic hash-leakage scenarios (forwarded invite emails, HTTP referrer to external CDNs on the setup page, server-side log exposure, abandoned invite emails in shared inboxes), this enables unauthenticated permanent account takeover months or years after invite issuance. If the leaked invite was sent to an admin, the takeover yields admin access. This issue has been patched in version 1.8.217.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/freescout-help-desk/freescout/releases/tag/1.8.217, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41902.json, https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-hqff-cwx7-3jpm, https://nvd.nist.gov/vuln/detail/CVE-2026-41902

Severity

9.1

CVSS Score
0
10

Basic Information

Base CVSS
9.1
EPSS Probability
0.00246%
EPSS Percentile
0.16223%
Introduced Version
0
Fix Available
c4e4220ae30aee29d79e669f67694c0501e754d1

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