CVE-2026-27023
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Lifecycle Timeline
2Description
Twenty is an open source CRM. Prior to version 1.18, the SSRF protection in SecureHttpClientService validated request URLs at the request level but did not validate redirect targets. An authenticated user who could control outbound request URLs (e.g., webhook endpoints, image URLs) could bypass private IP blocking by redirecting through an attacker-controlled server. This issue has been patched in version 1.18.
Analysis
Twenty CRM versions prior to 1.18 allow authenticated users to bypass SSRF protections by exploiting unvalidated HTTP redirect targets, enabling access to private IP addresses through attacker-controlled intermediaries. An attacker with control over webhook endpoints or image URLs can leverage this vulnerability to reach restricted internal resources that would normally be blocked.
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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