Symlink Attack Affecting langchain package, versions [,1.3.9)
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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Test your applications- Snyk IDSNYK-PYTHON-LANGCHAIN-17356217
- published17 Jun 2026
- disclosed16 Jun 2026
- creditHussein Aldulaimi, deprrous
Introduced: 16 Jun 2026
CVE-2026-55443 (opens in a new tab)How to fix?
Upgrade langchain to version 1.3.9 or higher.
Overview
langchain is a Building applications with LLMs through composability
Affected versions of this package are vulnerable to Symlink Attack via the file-search middleware and loaders that resolve filesystem paths and search patterns without confining the resolved path to the intended root directory. An attacker can access files outside the intended directory boundary by supplying crafted path values, glob patterns, or symlinks influenced by untrusted sources.