What is CVE-2026-59152?

CVE-2026-59152 is a medium-severity vulnerability in Langchain-ai Langsmith-sdk, classified under Path Traversal. CVSS score: 5.0/10. Published 2026-07-06.

How severe is CVE-2026-59152?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Path Traversal in Langchain-ai Langsmith-sdk

CVE-2026-59152

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.8.18, an attacker who can send an HTTP request to a server running the LangSmith SDK's TracingMiddleware can cause that server to read an arbitrary…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.

Affected products

Langchain-ai Langsmith-sdk — versions < 0.8.18

Weakness classification (CWE)

CWE-22 — Path Traversal
CWE-346 — Origin Validation Error
CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-59152?: CVE-2026-59152 is a medium-severity vulnerability in Langchain-ai Langsmith-sdk, classified under Path Traversal. CVSS score: 5.0/10. Published 2026-07-06.
How severe is CVE-2026-59152?: Medium severity. CVSS v3 base score is 5.0 out of 10.