Bug 2497371 (CVE-2026-59152)

Summary: CVE-2026-59152 langsmith: LangSmith SDK TracingMiddleware: Information Disclosure via Arbitrary Server-Side File Read
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anpicker, bbrownin, bparees, dfreiber, drow, dschmidt, hasun, jburrell, jfula, jlanda, jowilson, kshier, mbarnett, nyancey, ometelka, ptisnovs, rjohnson, simaishi, stcannon, syedriko, teagle, vkumar, xdharmai, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-06 16:01:45 UTC 
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 file from its local filesystem and upload the contents to LangSmith as a trace attachment. Depending on how the distributed trace system is deployed, triggering a read may not require authentication. Retrieving the contents requires read access to the LangSmith workspace the traces are sent to. The net effect is a trust-boundary crossing: a party with workspace trace-read access (for example a low-privilege workspace member, a contractor, or a compromised teammate account) gains the ability to read files from any server running TracingMiddleware, a capability outside that workspace's intended trust boundary. This vulnerability is fixed in 0.8.18.