What is CVE-2026-48776?

CVE-2026-48776 is a medium-severity vulnerability in Langchain-ai, classified under Path Traversal. CVSS score: 4.2/10. Published 2026-06-17.

How severe is CVE-2026-48776?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Auth bypass in Langchain-ai

CVE-2026-48776

LangGraph Python SDK is used to connect to running LangGraph API servers, manage assistants, threads and stream runs from Python applications. Versions 0.3.14 and prior have unsafe URL path construction through unsanitized caller-supplied…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Langchain-ai — versions < 1.2.1
Langchain-ai Langchain-sdk — versions < 0.3.15

Weakness classification (CWE)

CWE-22 — Path Traversal
CWE-863 — Incorrect Authorization

References

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

Frequently asked questions

What is CVE-2026-48776?: CVE-2026-48776 is a medium-severity vulnerability in Langchain-ai, classified under Path Traversal. CVSS score: 4.2/10. Published 2026-06-17.
How severe is CVE-2026-48776?: Medium severity. CVSS v3 base score is 4.2 out of 10.