CVE-2026-34450

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Source
https://cve.org/CVERecord?id=CVE-2026-34450
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34450.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34450
Aliases
Related
Published
2026-03-31T21:32:53.617Z
Modified
2026-04-17T06:29:13.805535601Z
Severity
  • 4.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Claude SDK for Python: Insecure Default File Permissions in Local Filesystem Memory Tool
Details

The Claude SDK for Python provides access to the Claude API from Python applications. From version 0.86.0 to before version 0.87.0, the local filesystem memory tool in the Anthropic Python SDK created memory files with mode 0o666, leaving them world-readable on systems with a standard umask and world-writable in environments with a permissive umask such as many Docker base images. A local attacker on a shared host could read persisted agent state, and in containerized deployments could modify memory files to influence subsequent model behavior. Both the synchronous and asynchronous memory tool implementations were affected. This issue has been patched in version 0.87.0.

Database specific 
{
    "cwe_ids": [
        "CWE-276",
        "CWE-732"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34450.json"
}
References

Affected packages

Git / github.com/anthropics/anthropic-sdk-python

Affected ranges

Type
GIT
Repo
https://github.com/anthropics/anthropic-sdk-python
Events
Introduced
d7c0974ce6ab94ca135b10b2a45308203c0e0c7e
Fixed
ab0c4460a170183ff036e2a3dad320ac4ac2c76d
Database specific 
{
    "versions": [
        {
            "introduced": "0.86.0"
        },
        {
            "fixed": "0.87.0"
        }
    ]
}

Affected versions

v0.*
v0.86.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34450.json"