Is CVE-2026-35020 actively exploited?

No active exploitation of CVE-2026-35020 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-35020 be exploited remotely?

No. CVE-2026-35020 requires local access to exploit.

What is the CVSS score of CVE-2026-35020?

CVE-2026-35020 has a CVSS score of 8.4 (HIGH).

HOME VULNERABILITIESCVE-2026-35020

HIGH

CVE-2026-35020

CWE-78Published: April 6, 2026· Updated: Apr 7, 2026

8.4

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:19.9th

Official Description

Anthropic Claude Code CLI and Claude Agent SDK contain an OS command injection vulnerability in the command lookup helper and deep-link terminal launcher that allows local attackers to execute arbitrary commands by manipulating the TERMINAL environment variable. Attackers can inject shell metacharacters into the TERMINAL variable which are interpreted by /bin/sh when the command lookup helper constructs and executes shell commands with shell=true. The vulnerability can be triggered during normal CLI execution as well as via the deep-link handler path, resulting in arbitrary command execution with the privileges of the user running the CLI.

NVD Source

Technical Analysis

CVE-2026-35020 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.4.