---
cve: "CVE-2025-68664"
severity: "CRITICAL"
cvss: 9.3
epss: "43.4%"
vendor: "langchain-ai"
kev: false
exploited: false
published: "2025-12-23 23:15:44"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T14:51:02+02:00"
---

# CVE-2025-68664

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Exploit-Evidenz

- [EDB-52514 — LangChain Core 1.2.4 - SSTI/RCE](https://www.exploit-db.com/exploits/52514)

## Patch verfügbar (OSV)

- 6dc06da1bb2f3781844895c259a67e40bc598f19 (Commit)
- 57279c7b817864282f810183f3287f807142dc3b (Commit)

## Referenzen

- <https://github.com/langchain-ai/langchain/security/advisories/GHSA-c67j-w6g6-q2cm>
- <https://github.com/langchain-ai/langchain/pull/34455>
- <https://github.com/langchain-ai/langchain/pull/34458>
- <https://github.com/langchain-ai/langchain/commit/5ec0fa69de31bbe3d76e4cf9cd65a6accb8466c8>
- <https://github.com/langchain-ai/langchain/commit/d9ec4c5cc78960abd37da79b0250f5642e6f0ce6>
- <https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D0.3.81>
- <https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-68664) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_