SB2026043037 - Multiple vulnerabilities in Claude Code

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Main Vulnerability Database SB2026043037

SB2026043037 - Multiple vulnerabilities in Claude Code

Published: April 30, 2026

Security Bulletin ID SB2026043037
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2026-24052)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 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


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.


2) Code Injection (CVE-ID: CVE-2025-59536)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper control of code generation in the startup trust dialog implementation when opening Claude Code in an untrusted directory. A remote attacker can trick the user into starting Claude Code in a crafted project directory to execute arbitrary code.

User interaction is required to start Claude Code in an untrusted directory.


Remediation

Install update from vendor's website.

References