Description
LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to LangSmith SDK Python 0.8.0 and JS/TS 0.6.0, the LangSmith SDK's prompt pull methods (pull_prompt / pull_prompt_commit 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 behavior. When pulling a public prompt by owner/name identifier, the manifest content is controlled by an external party, but prior versions of the SDK did not distinguish this from pulling a prompt within the caller's own organization. This vulnerability is fixed in LangSmith SDK Python 0.8.0 and JS/TS 0.6.0.
Published: 2026-05-27
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3644-q5cj-c5c7 LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning
History

Tue, 02 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 28 May 2026 02:00:00 +0000

Type Values Removed Values Added
First Time appeared Langchain-ai
Langchain-ai langsmith-sdk
Vendors & Products Langchain-ai
Langchain-ai langsmith-sdk

Wed, 27 May 2026 20:15:00 +0000

Type Values Removed Values Added
Description LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to LangSmith SDK Python 0.8.0 and JS/TS 0.6.0, the LangSmith SDK's prompt pull methods (pull_prompt / pull_prompt_commit 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 behavior. When pulling a public prompt by owner/name identifier, the manifest content is controlled by an external party, but prior versions of the SDK did not distinguish this from pulling a prompt within the caller's own organization. This vulnerability is fixed in LangSmith SDK Python 0.8.0 and JS/TS 0.6.0.
Title LangSmith Client SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N'}


Subscriptions

Langchain-ai Langsmith-sdk
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-02T18:13:59.496Z

Reserved: 2026-05-08T20:08:17.209Z

Link: CVE-2026-45134

cve-icon Vulnrichment

Updated: 2026-06-02T18:13:43.693Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-27T20:16:38.697

Modified: 2026-06-17T10:51:41.937

Link: CVE-2026-45134

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T01:45:03Z

Weaknesses