Incorrect Permission Assignment for Critical Resource Affecting anthropic package, versions [0.86.0,0.87.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published5 Apr 2026
- disclosed1 Apr 2026
- creditLucas Wang
Introduced: 1 Apr 2026
CVE-2026-34450 (opens in a new tab)How to fix?
Upgrade anthropic to version 0.87.0 or higher.
Overview
anthropic is a The official Python library for the anthropic API
Affected versions of this package are vulnerable to Incorrect Permission Assignment for Critical Resource in the local filesystem memory tool due to files being created with overly permissive permissions. An attacker can access or modify persisted agent state by reading or altering files created by the memory process.