Vulnerability Report

CVE-2025-65099

RCE

Title: Anthropic Claude Code RCE

RCE

Proof Of Concept

PoC Available for CVE-2025-65099

CWE Category CWE-94

Published Date Nov 19, 2025

Modified Date Nov 25, 2025

Exploit Status Available

Score 7.7 CVSS v4.0

Exploit Probability (EPSS)

0.44%

Vulnerability Summary

CVE-2025-65099: Claude Code is an agentic coding tool. Prior to version 1.0.39, when running on a machine with Yarn 3.0 or above, Claude Code could have been tricked to execute code contained in a project via yarn plugins before the user accepted the startup trust dialog. Exploiting this would have required a user to start Claude Code in an untrusted directory and to be using Yarn 3.0 or above. This issue has been patched in version 1.0.39.

Impacted Vendors

anthropic 1

Reference Links

https://github.com/anthropics/claude-code/security/advisories/GHSA-5hhx-v7f6-x7gv

CVSS v4.0

Source Entity [email protected]

Severity HIGH

7.7

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

PASSIVE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/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

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-65099 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/b-faller/cve-2025-65099

View Code

November 25, 2025 MODIFIED

Vulnerability data or affected products updated.

November 25, 2025 MODIFIED

Vulnerability data updated via NVD.

November 19, 2025 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction PASSIVE

CVSS Vector String


                                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/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

Affected Stack

No specific products linked.