What is CVE-2026-55443?

CVE-2026-55443 is a medium-severity vulnerability in Langchain-ai Langchain, classified under Path Traversal. CVSS score: 5.1/10. Published 2026-06-22.

How severe is CVE-2026-55443?

Medium severity. CVSS v3 base score is 5.1 out of 10.

Path Traversal in Langchain-ai Langchain

CVE-2026-55443

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.3.9, several LangChain components that resolve filesystem paths or expand search patterns do not consistently confine the resolved path to the intended r…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Langchain-ai Langchain — versions < 1.3.9
Langchain-ai Langchain-anthropic — versions < 1.4.6

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55443?: CVE-2026-55443 is a medium-severity vulnerability in Langchain-ai Langchain, classified under Path Traversal. CVSS score: 5.1/10. Published 2026-06-22.
How severe is CVE-2026-55443?: Medium severity. CVSS v3 base score is 5.1 out of 10.