CVE-2026-41686 (GCVE-0-2026-41686)
Vulnerability from cvelistv5 – Published: 2026-05-04 18:41 – Updated: 2026-05-05 14:38
VLAI
EPSS
VEX
Title
Claude SDK for TypeScript has Insecure Default File Permissions in Local Filesystem Memory Tool
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-05 14:35 UTC
CWE
- CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/anthropics/anthropic-sdk-types… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| anthropics | anthropic-sdk-typescript |
Affected:
>= 0.79.0, < 0.91.1
|
guessed |
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Sightings
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|---|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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