Prototype Pollution

Overview langsmith is a Client library to connect to the LangSmith Observability and Evaluation Platform. Affected versions of this package are vulnerable to Prototype Pollution via constructor.prototype in the baseAssignValue function. An attacker can modify the Object.prototype by supplying...

0xgasless-mcp (>=1.0.3, <=1.0.5), 4d-vector-search (>=1.0.0, <=1.0.1) +3205 more potentially affected by CVE-2026-40190 via langsmith (>=0.0.5, <=0.5.4)

langsmith NPM version =0.0.5, =1.0.3, =1.0.0, =1.11.0, =0.0.5, =0.0.1, =1.0.0, =0.0.0-dev-nicolas-fix-publishing-aurora-mcp-1750279939, =0.0.65, =1.0.6, =0.0.1, =0.0.1, =1.0.0, =1.0.0, =1.0.6 and more Source cves: CVE-2026-40190 Source advisory: SNYK:JS-LANGSMITH-15969264...

EUVD-2026-21594

LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete proto Guard in Internal lodash set...

0xgasless-mcp (>=1.0.3, <=1.0.5), 4d-vector-search (>=1.0.0, <=1.0.1) +3205 more potentially affected by CVE-2026-40190 via langsmith (>=0.0.5, <=0.5.4)

langsmith NPM version =0.0.5, =1.0.3, =1.0.0, =1.11.0, =0.0.5, =0.0.1, =1.0.0, =0.0.0-dev-nicolas-fix-publishing-aurora-mcp-1750279939, =0.0.65, =1.0.6, =0.0.1, =0.0.1, =1.0.0, =1.0.0, =1.0.6 and more Source cves: CVE-2026-40190 Source advisory: OSV:GHSA-FW9Q-39R9-C252...

GHSA-FW9Q-39R9-C252 LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete `__proto__` Guard in Internal lodash `set()`

GHSA-fw9q-39r9-c252: Prototype Pollution via Incomplete Lodash set Guard in langsmith-sdk Severity: Medium CVSS 5.6 Status: Fixed in 0.5.18 --- Summary The LangSmith JavaScript/TypeScript SDK langsmith contains an incomplete prototype pollution fix in its internally vendored lodash set utility. T...

LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete `__proto__` Guard in Internal lodash `set()`

GHSA-fw9q-39r9-c252: Prototype Pollution via Incomplete Lodash set Guard in langsmith-sdk Severity: Medium CVSS 5.6 Status: Fixed in 0.5.18 --- Summary The LangSmith JavaScript/TypeScript SDK langsmith contains an incomplete prototype pollution fix in its internally vendored lodash set utility. T...

CVE-2026-40190

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the LangSmith JavaScript/TypeScript SDK langsmith contains an incomplete prototype pollution fix in its internally vendored lodash set utility. The baseAssignValue function only guards against the...

CVE-2026-40190 LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete `__proto__` Guard in Internal lodash `set()`

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the LangSmith JavaScript/TypeScript SDK langsmith contains an incomplete prototype pollution fix in its internally vendored lodash set utility. The baseAssignValue function only guards against the...

CVE-2026-40190

The CVE-2026-40190 issue affects LangSmith JavaScript/TypeScript SDK (langsmith) prior to 0.5.18, where an incomplete prototype pollution fix in the vendored lodash set() allows traversal via constructor.prototype, enabling an attacker who controls data keys processed by createAnonymizer() to pol...

CVE-2026-40190

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the LangSmith JavaScript/TypeScript SDK langsmith contains an incomplete prototype pollution fix in its internally vendored lodash set utility. The baseAssignValue function only guards against the...

CVE-2026-40190 LangSmith Client SDKs has Prototype Pollution in langsmith-sdk via Incomplete `__proto__` Guard in Internal lodash `set()`

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to 0.5.18, the LangSmith JavaScript/TypeScript SDK langsmith contains an incomplete prototype pollution fix in its internally vendored lodash set utility. The baseAssignValue function only guards against the...

LangSmith Client SDKs 安全漏洞

LangSmith Client SDKs are a developer toolkit open-sourced by LangChain. Versions of LangSmith Client SDKs prior to 0.5.18 contained security vulnerabilities. These vulnerabilities stemmed from incomplete prototype pollution repairs in the lodash set utility provided internally within the LangSmi...

PT-2026-32040

Name of the Vulnerable Software and Affected Versions LangSmith versions prior to 0.5.18 Description The LangSmith JavaScript/TypeScript SDK langsmith contained an incomplete prototype pollution fix in its internally vendored lodash set utility. The baseAssignValue function only guarded against t...

AI Flaws in Amazon Bedrock, LangSmith, and SGLang Enable Data Exfiltration and RCE

Cybersecurity researchers have disclosed details of a new method for exfiltrating sensitive data from artificial intelligence AI code execution environments using domain name system DNS queries. In a report published Monday, BeyondTrust revealed that Amazon Bedrock AgentCore Code Interpreter's...

CVE-2026-25750

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The...

CVE-2026-25750

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The...

EUVD-2026-9499

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The...

CVE-2026-25750 LangSmith Studio has URL Parameter Injection Vulnerability that Enables Token Theft via Malicious baseUrl

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The...

CVE-2026-25750

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The...

CVE-2026-25750 LangSmith Studio has URL Parameter Injection Vulnerability that Enables Token Theft via Malicious baseUrl

Langchain Helm Charts are Helm charts for deploying Langchain applications on Kubernetes. Prior to langchain-ai/helm version 0.12.71, a URL parameter injection vulnerability existed in LangSmith Studio that could allow unauthorized access to user accounts through stolen authentication tokens. The...