Server-Side Request Forgery (SSRF) in Twenty - CVE-2026-27023
Published: July 28, 2026
Vulnerability identifier: #VU139929
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27023
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Twenty
Affected software:
Twenty
Twenty
Detailed vulnerability description
The vulnerability allows a remote user to disclose sensitive information from internal network services.
The vulnerability exists due to server-side request forgery in SecureHttpClientService when following HTTP redirects for outbound requests. A remote user can supply a URL that redirects to an internal network address to disclose sensitive information from internal network services.
Cross-protocol redirects from HTTPS to HTTP can bypass the configured agent, and exploitability depends on the deployment environment and reachable internal services.
How to mitigate CVE-2026-27023
Install security update from vendor's website.