Authorization bypass through user-controlled key in EspoCRM - CVE-2026-46708
Published: June 18, 2026
Vulnerability identifier: #VU134836
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46708
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: EspoCRM
Affected software:
EspoCRM
EspoCRM
Detailed vulnerability description
The vulnerability allows a remote user to modify the opt-out state of a protected contact or lead without authorization.
The vulnerability exists due to authorization bypass through a user-controlled key in target-list opt-out actions when handling opt-out requests for contacts or leads referenced through a shared target list. A remote user can send a crafted opt-out action request to modify the opt-out state of a protected contact or lead without authorization.
The issue affects cases where the user can access a shared target list but does not have read or edit access to the target contact or lead.
How to mitigate CVE-2026-46708
Install security update from vendor's website.