CVE-2026-34451
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 0.81.0, the local filesystem memory tool in the Anthropic TypeScript SDK validated model-supplied paths using a string prefix check that did not append a trailing path separator. A model steered by prompt injection could supply a crafted path that resolved to a sibling directory sharing the memory root's name as a prefix, allowing reads and writes outside the sandboxed memory directory. This issue has been patched in version 0.81.0.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.3
- CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- EPSS probability
- 0.35%
- CWE
- CWE-22, CWE-41
- Published
- 2026-03-31
- Last modified
- 2026-03-31
Affected products
- anthropics anthropic-sdk-typescript
Weakness type
Related vulnerabilities
- CVE-2026-86775 — knowns before 0.30.0 Path Traversal via Document API
- CVE-2026-86099 — Chainlit through 2.12.0 Path Traversal via socket.io sessionId
- CVE-2026-78485 — Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to...
- CVE-2026-19729 — Keycloak-services: keycloak-services: incomplete fix for arbitrary filesystem path probing via keystore parameters
- CVE-2026-87023 — Tanium addressed a path traversal vulnerability in Comply.
- CVE-2026-87030 — Tanium addressed a path traversal vulnerability in Comply.
- CVE-2026-14505 — Tanium addressed a path traversal vulnerability in Tanium Data Service.
- CVE-2026-53581 — ntp: write path traversal