Is CVE-2026-55607 actively exploited?

No active exploitation of CVE-2026-55607 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-55607 be exploited remotely?

Yes. CVE-2026-55607 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-55607?

CVE-2026-55607 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-55607

CWE-22Published: June 29, 2026· Updated: Jun 30, 2026

8.8

CVSS v3.1

EPSS:0.70%probability of exploitation in 30 daysPercentile:48.4th

Official Description

Claude Code is an agentic coding tool. From 2.1.38 until 2.1.163, Claude Code's worktree handling allowed creation of worktrees named ".git" and navigation to worktrees outside the sandbox context, enabling git directory confusion attacks. By exploiting symlink manipulation and git fsmonitor execution during worktree operations, an attacker could overwrite files in the user's home directory (such as .zshenv), leading to code execution outside of seatbelt sandbox restrictions. Reliably exploiting this required the user to clone a malicious repository containing prompt injection content and run Claude Code against it. This vulnerability is fixed in 2.1.163.

NVD Source

Technical Analysis

CVE-2026-55607 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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 8.8.