# Langchain Core vulnerabilities

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

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Langchain Core: 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-40087, was published on 9 April 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (1 critical, 0 exploited in the wild)

## About Langchain Core

LangChain Core is a Python library providing abstractions for building language model applications.

## Latest Langchain Core vulnerabilities

- [CVE-2026-40087: LangChain incomplete f-string validation in prompt templates](https://junglewise.ai/threats/cve-2026-40087-langchain-incomplete-f-string-validation-in-prompt-templates) (medium, CVSS 5.3, published 9 Apr 2026)
- [CVE-2025-68665: LangChain serialization injection enables secret extraction](https://junglewise.ai/threats/cve-2025-68665-langchain-serialization-injection-enables-secret-extraction) (high, CVSS 8.6, published 23 Dec 2025)
- [CVE-2025-68664: LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs](https://junglewise.ai/threats/cve-2025-68664-langchain-serialization-injection-vulnerability-enables-secret) (critical, CVSS 9.3, published 23 Dec 2025)

## Most severe Langchain Core vulnerabilities

- [CVE-2025-68664: LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs](https://junglewise.ai/threats/cve-2025-68664-langchain-serialization-injection-vulnerability-enables-secret) (critical, CVSS 9.3, published 23 Dec 2025)
- [CVE-2025-68665: LangChain serialization injection enables secret extraction](https://junglewise.ai/threats/cve-2025-68665-langchain-serialization-injection-enables-secret-extraction) (high, CVSS 8.6, published 23 Dec 2025)
- [CVE-2026-40087: LangChain incomplete f-string validation in prompt templates](https://junglewise.ai/threats/cve-2026-40087-langchain-incomplete-f-string-validation-in-prompt-templates) (medium, CVSS 5.3, published 9 Apr 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 LangSmith SDK](https://junglewise.ai/threats/technologies/langsmith-sdk): 4 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 Core vulnerabilities", https://junglewise.ai/threats/technologies/langchain-langchain-core, 9 November 2026.