Input validation error in Claude Code - CVE-2026-24052
Published: April 30, 2026
Vulnerability identifier: #VU128518
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2026-24052
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Claude Code
How to mitigate CVE-2026-24052
Install security update from vendor's website.
Claude Code - update to 1.0.111