CVE-2026-59152
Description
A flaw was found in the LangSmith Client SDK's TracingMiddleware. An attacker can send an HTTP request to a server running the TracingMiddleware, causing it to read an arbitrary file from its local filesystem. The contents of this file are then uploaded to LangSmith as a trace attachment. This vulnerability allows a party with trace-read access to the LangSmith workspace to read files from any server utilizing TracingMiddleware, leading to unauthorized information disclosure.
Statement
This Moderate-impact information disclosure flaw in LangSmith Client SDK's TracingMiddleware allows an authenticated attacker with trace-read access to a LangSmith workspace to read arbitrary files from a server running the middleware. This represents a trust-boundary crossing, enabling unauthorized access to local filesystem data on affected systems where the TracingMiddleware is exposed via HTTP.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5 | N/A | 5 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Changed | N/A | Changed |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
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