What’s Vulnerable › Vulnerabilities

CVE-2026-27023: Twenty: SSRF protection bypass via HTTP redirect following in secure HTTP client

• Severity: medium (CVSS 5.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-05 · updated 2026-06-17
• Weakness: CWE-918

Description

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.

Affected products

• twentyhq twenty: before 1.18.0 — fixed in 1.18.0

How to fix

Upgrade to a fixed version: twentyhq twenty 1.18.0. Check the vendor advisory for mitigations.

References

• https://github.com/twentyhq/twenty/releases/tag/v1.18.0
• https://github.com/twentyhq/twenty/security/advisories/GHSA-wm7q-rvq3-x8q9

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