CVE-2026-41686

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Source
https://cve.org/CVERecord?id=CVE-2026-41686
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41686.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-41686
Aliases
Downstream
Published
2026-05-04T18:41:40.183Z
Modified
2026-07-15T01:49:05.907339081Z
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 TypeScript has Insecure Default File Permissions in Local Filesystem Memory Tool
Details

Claude SDK for TypeScript provides access to the Claude API from server-side TypeScript or JavaScript applications. From version 0.79.0 to before version 0.91.1, the BetaLocalFilesystemMemoryTool in the Anthropic TypeScript SDK created memory files and directories using the Node.js default modes (0o666 for files, 0o777 for directories), 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. This issue has been patched in version 0.91.1.

Database specific 
{
    "cwe_ids": [
        "CWE-732"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41686.json"
}
References

Affected packages

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

Affected ranges

Type
GIT
Repo
https://github.com/anthropics/anthropic-sdk-typescript
Events
Introduced
af66c809a5b59d6dc6e02e405b2c449fd9432e5e
Fixed
74ac150346ca92290b0fc57d9728e3841aa2dd54
Database specific 
{
    "cpe": "cpe:2.3:a:anthropic:claude_sdk_for_typescript:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0.79.0"
        },
        {
            "fixed": "0.91.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

aws-sdk-v0.*
aws-sdk-v0.2.0
aws-sdk-v0.2.5
bedrock-sdk-v0.*
bedrock-sdk-v0.27.0
bedrock-sdk-v0.28.0
bedrock-sdk-v0.28.1
bedrock-sdk-v0.29.0
sdk-v0.*
sdk-v0.79.0
sdk-v0.80.0
sdk-v0.81.0
sdk-v0.82.0
sdk-v0.83.0
sdk-v0.84.0
sdk-v0.85.0
sdk-v0.86.0
sdk-v0.86.1
sdk-v0.87.0
sdk-v0.88.0
sdk-v0.89.0
sdk-v0.90.0
sdk-v0.91.0
vertex-sdk-v0.*
vertex-sdk-v0.15.0
vertex-sdk-v0.16.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41686.json"