What is CVE-2026-41686?

CVE-2026-41686 is a medium-severity vulnerability in Anthropic Claude_sdk_for_typescript, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 4.4/10. Published 2026-05-04.

How severe is CVE-2026-41686?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Anthropic Claude_sdk_for_typescript

CVE-2026-41686

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 mem…

EPSS: 0.000 (1.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Anthropic Claude_sdk_for_typescript
Anthropics Anthropic-sdk-typescript — versions >= 0.79.0, < 0.91.1

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41686?: CVE-2026-41686 is a medium-severity vulnerability in Anthropic Claude_sdk_for_typescript, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 4.4/10. Published 2026-05-04.
How severe is CVE-2026-41686?: Medium severity. CVSS v3 base score is 4.4 out of 10.