CVE-2026-25725: Claude Code Sandbox Escape via Settings Injection

# CVE-2026-25725: Claude Code Sandbox Escape via Settings Injection

https://gcdradar.vercel.app/incidents/cve-2026-25725-claude-code-sandbox-escape-via-settings-injec · AIR-2026-0463 · closed 2026-02-06

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-02-06
- AI role: Attack on AI
- Products: Claude Code
- CVE ids: CVE-2026-25725
- CVSS: 7.7

## Summary

A sandbox escape flaw in Claude Code allowed malicious code to create and inject persistent hooks into settings.json when it was missing at startup. Standard auto-update users received the fix automatically.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-02-06: CVE-2026-25725: Claude Code is an agentic coding tool. (https://nvd.nist.gov/vuln/detail/CVE-2026-25725)
- 2026-02-06: CVE-2026-25725: Claude Code has Sandbox Escape via Persistent Configuration Injection in settings.json (https://github.com/advisories/GHSA-ff64-7w26-62rf)

## Sources

- 2026-02-06 GitHub Advisory Database: CVE-2026-25725: Claude Code has Sandbox Escape via Persistent Configuration Injection in settings.json https://github.com/advisories/GHSA-ff64-7w26-62rf
- 2026-02-06 NVD: CVE-2026-25725: Claude Code is an agentic coding tool. https://nvd.nist.gov/vuln/detail/CVE-2026-25725

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.