CVE-2026-35020

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Source
https://cve.org/CVERecord?id=CVE-2026-35020
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35020.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-35020
Published
2026-04-06T18:58:40.513Z
Modified
2026-07-08T08:11:22.450331002Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Anthropic Claude Code & Agent SDK OS Command Injection via TERMINAL Environment Variable
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35020.json",
    "cna_assigner": "VulnCheck",
    "isDisputed": true
}
References

Affected packages

Git / github.com/anthropics/claude-agent-sdk-python

Affected ranges

Type
GIT
Repo
https://github.com/anthropics/claude-agent-sdk-python
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
67718a7c4a46790368ff1202c967b3afdb355970
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.1.55"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.0.16
v0.0.17
v0.0.18
v0.0.19
v0.0.20
v0.0.21
v0.0.22
v0.0.23
v0.1.0
v0.1.1
v0.1.10
v0.1.11
v0.1.12
v0.1.13
v0.1.14
v0.1.15
v0.1.16
v0.1.17
v0.1.19
v0.1.2
v0.1.20
v0.1.21
v0.1.23
v0.1.24
v0.1.25
v0.1.26
v0.1.27
v0.1.28
v0.1.29
v0.1.3
v0.1.30
v0.1.31
v0.1.32
v0.1.33
v0.1.34
v0.1.35
v0.1.36
v0.1.37
v0.1.38
v0.1.39
v0.1.4
v0.1.40
v0.1.41
v0.1.42
v0.1.43
v0.1.44
v0.1.45
v0.1.46
v0.1.47
v0.1.48
v0.1.49
v0.1.5
v0.1.50
v0.1.51
v0.1.52
v0.1.53
v0.1.54
v0.1.55
v0.1.6
v0.1.7
v0.1.8
v0.1.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35020.json"

Git / github.com/anthropics/claude-code

Affected ranges

Type
GIT
Repo
https://github.com/anthropics/claude-code
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
1e03cc7fc40d9bab33f24855a8b5d31ba66205cb
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.1.91"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v2.*
v2.0.73
v2.0.74
v2.0.76
v2.1.0
v2.1.1
v2.1.11
v2.1.12
v2.1.14
v2.1.15
v2.1.16
v2.1.17
v2.1.19
v2.1.2
v2.1.20
v2.1.21
v2.1.22
v2.1.23
v2.1.25
v2.1.27
v2.1.29
v2.1.3
v2.1.30
v2.1.31
v2.1.32
v2.1.33
v2.1.34
v2.1.36
v2.1.37
v2.1.38
v2.1.39
v2.1.4
v2.1.41
v2.1.42
v2.1.44
v2.1.45
v2.1.47
v2.1.49
v2.1.5
v2.1.50
v2.1.51
v2.1.52
v2.1.53
v2.1.55
v2.1.56
v2.1.58
v2.1.59
v2.1.6
v2.1.61
v2.1.62
v2.1.63
v2.1.66
v2.1.68
v2.1.69
v2.1.7
v2.1.70
v2.1.71
v2.1.72
v2.1.73
v2.1.74
v2.1.75
v2.1.76
v2.1.77
v2.1.78
v2.1.79
v2.1.80
v2.1.81
v2.1.83
v2.1.84
v2.1.85
v2.1.86
v2.1.87
v2.1.88
v2.1.89
v2.1.9
v2.1.90
v2.1.91

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35020.json"