Deserialization of Untrusted Data

Overview langsmith is a Client library to connect to the LangSmith Observability and Evaluation Platform. Affected versions of this package are vulnerable to Deserialization of Untrusted Data when fetching and processing prompt manifests from external sources. An attacker can execute arbitrary co...

LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Description The LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

GHSA-3644-Q5CJ-C5C7 LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning

Description The LangSmith SDK's prompt pull methods pullprompt / pullpromptcommit in Python, pullPrompt / pullPromptCommit in JS/TS fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime...

SUSE CVE-2026-41182

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When ...

CVE-2026-41182

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When ...

CVE-2026-41182 LangSmith SDK: Streaming token events bypass output redaction

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When ...

CVE-2026-41182 LangSmith SDK: Streaming token events bypass output redaction

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When ...

CVE-2026-41182

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When ...

CVE-2026-41182

Summary: The CVE affects LangSmith Client SDKs (JavaScript and Python) prior to specific fixes. When a run produces streaming output, each token in the stream is stored as a separate new_token event containing the raw token value, bypassing the SDK’s output redaction. The redaction controls (hide...

CVE-2026-41182 LangSmith SDK: Streaming token events bypass output redaction

LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to version 0.5.19 of the JavaScript SDK and version 0.7.31 of the Python SDK, the LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When ...

LangSmith Client SDKs 信息泄露漏洞

LangSmith Client SDKs are a developer toolkit open-sourced by LangChain. LangSmith Client SDKs have a vulnerability related to information leakage, which stems from the fact that output editing controls do not apply to streaming token events, potentially leading to sensitive LLM outputs being...

Insertion of Sensitive Information into Log File

Overview langsmith is a Client library to connect to the LangSmith Observability and Evaluation Platform. Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File through the Client handling of events. An attacker can bypass redaction controls and...

0xgasless-mcp (>=1.0.3, <=1.0.5), 4d-vector-search (>=1.0.0, <=1.0.1) +3193 more potentially affected by CVE-2026-41182 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, =1.0.0, =1.0.0, =1.0.0, =1.0.1 and more Source cves: CVE-2026-41182 Source advisory: SNYK:JS-LANGSMITH-16082039...

0xgasless-mcp (>=1.0.3, <=1.0.5), 4d-vector-search (>=1.0.0, <=1.0.1) +3193 more potentially affected by CVE-2026-41182 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, =1.0.0, =1.0.0, =1.0.0, =1.0.1 and more Source cves: CVE-2026-41182 Source advisory: OSV:GHSA-RR7J-V2Q5-CHGV...

LangSmith SDK: Streaming token events bypass output redaction

Summary The LangSmith SDK's output redaction controls hideOutputs in JS, hideoutputs in Python do not apply to streaming token events. When an LLM run produces streaming output, each chunk is recorded as a newtoken event containing the raw token value. These events bypass the redaction pipeline...

Insertion of Sensitive Information into Log File

Overview langsmith is a Client library to connect to the LangSmith Observability and Evaluation Platform. Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File through the Client handling of events. An attacker can bypass redaction controls and...

PT-2026-34593

Name of the Vulnerable Software and Affected Versions LangSmith JavaScript SDK versions prior to 0.5.19 LangSmith Python SDK versions prior to 0.7.31 Description Output redaction controls do not apply to streaming token events. When a Large Language Model run produces streaming output, each chunk...

SUSE 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 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...

Prototype Pollution

LangSmith is vulnerable to Prototype Pollution. The vulnerability is due to an incomplete prototype pollution fix in its internally vendored lodash set utility, where the baseAssignValue function only guards against the proto key, but fails to prevent traversal via constructor.prototype, and...