CVE-2026-88066

HIGH
MEDIUM Priority: 0.02 BB Relevance: 65/100
Published: 2026-11-03 Modified: 2026-11-09 First seen: 2026-11-03 Status: active

Attack Surface

Network Low Complexity No Auth Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Active
S: X
AT: Present
VC: High
VI: High
VA: High

Description

Claude Desktop is Anthropic's desktop application for interacting with Claude. Prior to 1.8089.0, Claude Desktop on Windows invokes git.exe through uv_spawn without an absolute path, allowing Windows search-path resolution to select a malicious git.exe placed in the opened project's current working directory before the intended system executable. Opening an attacker-controlled or shared repository can therefore execute the substituted program with the user's privileges. This issue is fixed in version 1.8089.0.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
anthropics claude-code < 1.8089.0
anthropics claude-code < 1.8089.0

Bug Bounty Relevance

65 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

7.5 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/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

EPSS — Exploitation Probability

0.29%
Raw Score 0.002870
Percentile 21.5%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00287
2026-11-13
0.00287
2026-11-12
0.00287
2026-11-10
0.00287
2026-11-09
0.00287
2026-11-08
0.00253
2026-11-07
0.00253
2026-11-06
0.00253
2026-11-05
0.00253
2026-11-04
0.00253

Intelligence Sources

mitre ref →
nvd ref →