Input validation error in Claude Code - CVE-2026-24052

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Main Vulnerability Database Vulnerabilities #VU128518

Input validation error in Claude Code - CVE-2026-24052

Published: April 30, 2026


Vulnerability identifier: #VU128518
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-24052
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Claude Code
Software vendor:
Anthropic

Description

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper input validation in the trusted domain verification mechanism for WebFetch requests when validating trusted domains. A remote attacker can register or use a crafted domain name that passes validation to disclose sensitive information.

User interaction is required.


Remediation

Install security update from vendor's website.

External links