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CVE-2026-35451

5.7 · MEDIUM

Twenty is an open source CRM.

Published Apr 21, 2026CWE-79EPSS 0.42%

Overview

CVE-2026-35451 is a medium-severity vulnerability. It was published on April 21, 2026 and has a CVSS 3.1 base score of 5.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Twenty is an open source CRM. Prior to 1.20.6, a Stored Cross-Site Scripting (XSS) vulnerability exists in the BlockNote editor component. Due to a lack of protocol validation in the FileBlock component and insufficient server-side inspection of block content, an attacker can inject a javascript: URI into the url property of a file block. This allows the execution of arbitrary JavaScript when a user clicks on the malicious file attachment. This vulnerability is fixed in 1.20.6.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/twentyhq/twenty/commit/8da69e0f77ea820a6845a4c3c025b6af3861d523GitHubgithub.com/twentyhq/twenty/security/advisories/GHSA-7w89-7q26-gj7qGitHubgithub.com/twentyhq/twenty/security/advisories/GHSA-7w89-7q26-gj7q

How CyberStrike helps

Frequently asked questions

What is CVE-2026-35451?

CVE-2026-35451 is a medium-severity vulnerability. It was published on April 21, 2026 and has a CVSS 3.1 base score of 5.7 (MEDIUM).

How severe is CVE-2026-35451?

This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-35451?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-35451?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-35451 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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