🛡️ CVE-2026-24052 — claude-code

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-601 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Claude Code has a Domain Validation Bypass which Allows Automatic Requests to Attacker-Controlled Domains

Claude Code contained insufficient URL validation in its trusted domain verification mechanism for WebFetch requests. The application used a startsWith() function to validate trusted domains (e.g., docs.python.org, modelcontextprotocol.io), this could have enabled attackers to register domains like modelcontextprotocol.io.example.com that would pass validation. This could enable automatic requests to attacker-controlled domains without user consent, potentially leading to data exfiltration.

Users on standard Claude Code auto-update have received this fix already. Users performing manual updates are advised to update to the latest version.

Thank you to hackerone.com/47sid-praetorian for reporting this issue!

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-24052 is classified as CWE-601: Open Redirect. A redirect target is taken from user input, so a trusted link can send the visitor to an attacker's site.

Affected software

CVE-2026-24052 is recorded against 2 packages.

  • @anthropic-ai/claude-code
  • claude-code (fixed in 1.0.111)

Timeline and source

Published on 3 February 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
CWE CWE-601
Public Exploit ✅ No
Source NVD
Published 2026-02-03
Updated 2026-08-12
Modified 2026-02-03
Fix URL N/A

Affected Packages

Software From version Fixed in
@anthropic-ai/claude-code — —
claude-code — 1.0.111

Similar Threats

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