Claude Code vulnerabilities: known CVEs & security history
Anthropic · Developer Tools · 23 tracked CVEs · 0 actively exploited · updated June 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all Claude Code release lines — 23 in total. A CVE here doesn't mean your version is affected — check Claude Code's current status and the safe version to run.
Known Claude Code CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-39861 | critical | 10 | 1% | 2026 |
| CVE-2026-25725 | critical | 10 | 0% | 2026 |
| CVE-2025-66032 | critical | 9.8 | 1% | 2025 |
| CVE-2025-64755 | critical | 9.8 | 0% | 2025 |
| CVE-2025-65099 | critical | 9.8 | 0% | 2025 |
| CVE-2025-59828 | critical | 9.8 | 0% | 2025 |
| CVE-2025-59041 | critical | 9.8 | 1% | 2025 |
| CVE-2025-58764 | critical | 9.8 | 1% | 2025 |
| CVE-2025-54795 | critical | 9.8 | 1% | 2025 |
| CVE-2026-25722 | critical | 9.1 | 0% | 2026 |
| CVE-2025-54794 | critical | 9.1 | 1% | 2025 |
| CVE-2026-40068 | high | 8.8 | 0% | 2026 |
| CVE-2026-33068 | high | 8.8 | 0% | 2026 |
| CVE-2026-24887 | high | 8.8 | 1% | 2026 |
| CVE-2025-59536 | high | 8.8 | 29% | 2025 |
| CVE-2026-25724 | high | 7.5 | 0% | 2026 |
| CVE-2026-21852 | high | 7.5 | 31% | 2026 |
| CVE-2025-55284 | high | 7.5 | 0% | 2025 |
| CVE-2026-24052 | high | 7.4 | 0% | 2026 |
| CVE-2026-35603 | high | 7.3 | 0% | 2026 |
| CVE-2026-25723 | medium | 6.5 | 0% | 2026 |
| CVE-2026-24053 | medium | 6.5 | 0% | 2026 |
| CVE-2025-59829 | medium | 6.5 | 0% | 2025 |
Is my Claude Code version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your Claude Code version → · Monitor Claude Code for new CVEs →
Claude Code vulnerabilities — frequently asked
How many known vulnerabilities does Claude Code have?
IsItPatched tracks 23 CVEs for Claude Code. 11 are critical-severity and 9 high-severity. These span every release line — what matters is whether the version you run is affected.
Does Claude Code have any actively-exploited vulnerabilities?
None of Claude Code's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe Claude Code vulnerability?
Among tracked issues, CVE-2026-39861 (CRITICAL, CVSS 10) ranks highest — a Path traversal weakness.
Is Claude Code safe to use?
It depends on the version. The latest supported Claude Code release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: Claude Code security status · Claude Code end-of-life · actively-exploited CVEs. Always verify against Anthropic's advisories — see our disclaimer.