# LangChain LangSmith SDK vulnerabilities

Source: https://junglewise.ai/threats/technologies/langsmith-sdk  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/langsmith-sdk.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in LangChain LangSmith SDK: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-25528, was published on 13 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 4 (0 critical, 0 exploited in the wild)

## About LangChain LangSmith SDK

The official Python and JavaScript client library for interacting with the LangSmith platform for LLM application tracing and evaluation.

## Latest LangChain LangSmith SDK vulnerabilities

- [CVE-2026-25528: PYSEC-2026-2584 - LangSmith Client SDK Affected by Server-Side Request Forgery via Tracing Header Injection](https://junglewise.ai/threats/cve-2026-25528-langchain-langsmith-sdk-server-side-request-forgery-via-tracing) (low, CVSS 3.1, published 13 Jul 2026)
- [CVE-2026-59152: LangChain LangSmith SDK arbitrary file read in TracingMiddleware](https://junglewise.ai/threats/cve-2026-59152-langchain-langsmith-sdk-arbitrary-file-read-in-tracingmiddleware) (medium, CVSS 5, published 6 Jul 2026)
- [CVE-2026-45134: LangChain LangSmith SDK untrusted deserialization in prompt pull methods](https://junglewise.ai/threats/cve-2026-45134-langchain-langsmith-sdk-untrusted-deserialization-in-prompt-pull) (high, CVSS 7.1, published 27 May 2026)
- [CVE-2026-41182: LangChain LangSmith SDK sensitive information leak in streaming events](https://junglewise.ai/threats/cve-2026-41182-langchain-langsmith-sdk-sensitive-information-leak-in-streaming) (medium, CVSS 5.3, published 23 Apr 2026)

## Most severe LangChain LangSmith SDK vulnerabilities

- [CVE-2026-45134: LangChain LangSmith SDK untrusted deserialization in prompt pull methods](https://junglewise.ai/threats/cve-2026-45134-langchain-langsmith-sdk-untrusted-deserialization-in-prompt-pull) (high, CVSS 7.1, published 27 May 2026)
- [CVE-2026-41182: LangChain LangSmith SDK sensitive information leak in streaming events](https://junglewise.ai/threats/cve-2026-41182-langchain-langsmith-sdk-sensitive-information-leak-in-streaming) (medium, CVSS 5.3, published 23 Apr 2026)
- [CVE-2026-59152: LangChain LangSmith SDK arbitrary file read in TracingMiddleware](https://junglewise.ai/threats/cve-2026-59152-langchain-langsmith-sdk-arbitrary-file-read-in-tracingmiddleware) (medium, CVSS 5, published 6 Jul 2026)
- [CVE-2026-25528: PYSEC-2026-2584 - LangSmith Client SDK Affected by Server-Side Request Forgery via Tracing Header Injection](https://junglewise.ai/threats/cve-2026-25528-langchain-langsmith-sdk-server-side-request-forgery-via-tracing) (low, CVSS 3.1, published 13 Jul 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other LangChain technologies

- [Langchain Core](https://junglewise.ai/threats/technologies/langchain-langchain-core): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "LangChain LangSmith SDK vulnerabilities", https://junglewise.ai/threats/technologies/langsmith-sdk, 9 November 2026.