VDB
CVE-2026-34452
CVE-2026-34452
PUBLISHED
CVSS 5.800000190734863 MEDIUM
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 async local filesystem memory tool in the Anthropic Python SDK validated that model-supplied paths resolved inside the sandboxed memory directory, but then returned the unresolved path for subsequent file operations. A local attacker able to write to the memory directory could retarget a symlink between validation and use, causing reads or writes to escape the sandbox. The synchronous memory tool implementation was not affected. This issue has been patched in version 0.87.0.
EPSS 0.00% · 0.2th percentile
Risk Scores
CVSS v4.0
5.800000190734863
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS Score
0.00%
0.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cloudflare | access | |
| anthropics | anthropic-sdk-python | >= 0.86.0, < 0.87.0 |
Timeline
- Mar 31, 2026 CVE Published
- Mar 31, 2026 CVE Updated
- Apr 2, 2026 Security Advisory
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score
- May 26, 2026 EPSS Score