CVE-2026-24052 json
Claude Code has a Domain Validation Bypass which Allows Automatic Requests to Attacker-Controlled Domains
published 9mo ago modified 4mo ago also GHSA-vhw5-3g5m-8ggf , EUVD-2026-5172
- cvss
- 7.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
Claude Code is an agentic coding tool. Prior to version 1.0.111, 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. This issue has been patched in version 1.0.111.
Patch / fix
- npm @anthropic-ai/claude-code 1.0.111
- anthropic claude_code 1.0.111
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @anthropic-ai/claude-code | <1.0.111 |
1.0.111 |
Affected products
- anthropics claude-code
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
-
github.com
/anthropics/claude-code/security/advisories/GHSA-vhw5-3g5m-8ggf
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-24052
advisory
-
github.com
/anthropics/claude-code
package
Sources
- CVE List CVE-2026-24052
- GitHub Advisory GHSA-vhw5-3g5m-8ggf
- NVD CVE-2026-24052
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