HighVulnerabilityLLM-specific

CVE-2026-73222: Claude Code Templates Studio command execution via unauthenticated API

Source: NVD(opens in a new tab)
Identifier: CVE-2026-73222
Published: August 11, 2026
Record updated: October 9, 2026

Affected: claude-code-templates <= 1.29.2
Fixed in: 1.29.4
released July 14, 2026, 28 days before disclosure
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.3%

Summary

Claude Code Templates versions before 1.29.4 ship a Claude Code Studio server, started with the --studio option, that binds to all interfaces on port 3444, allows cross-origin requests, and requires no authentication. Request-body fields prompt and agentName reach child_process.spawn() with shell execution enabled, so shell metacharacters are interpreted, letting an attacker who can reach the port, or lure a developer to a malicious website, run arbitrary OS commands with the developer's privileges.

Mitigation

Fixed in 1.29.4.

Details

Scores and exploitation

CVSS score: 8.8(high)
Patch available: Yes
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector: network
Attack complexity: low
Privileges required: none
User interaction: required
EPSS: 0.3%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 11, 2026.
Disclosure date: August 11, 2026

Weaknesses and techniques

Weakness (CWE): CWE-78
CWE-306
CWE-352
Attack pattern (CAPEC): CAPEC-115
CAPEC-88

Affected

Packages: claude-code-templates@<= 1.29.2 (fixed: 1.29.4)
Vendors: Anthropic

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Agent
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-73222

First tracked: August 11, 2026 at 08:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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