---
cve: "CVE-2026-34070"
severity: "HIGH"
cvss: 7.5
epss: "1.2%"
vendor: "langchain-ai"
kev: false
exploited: false
published: "2026-03-31 03:15:58"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T03:58:29+02:00"
---

# CVE-2026-34070

> 7.5 HIGH · 🧪 PoC

## Beschreibung

LangChain is a framework for building agents and LLM-powered applications. Prior to version 1.2.22, multiple functions in langchain_core.prompts.loading read files from paths embedded in deserialized config dicts without validating against directory traversal or absolute path injection. When an application passes user-influenced prompt configurations to load_prompt() or load_prompt_from_config(), an attacker can read arbitrary files on the host filesystem, constrained only by file-extension checks (.txt for templates, .json/.yaml for examples). This issue has been patched in version 1.2.22.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- d22df94537e4267f72dc1bbfc8e3849baf20d9f7 (Commit)
- 27add913474e01e33bededf4096151130ba0d47c (Commit)

## Referenzen

- <https://github.com/langchain-ai/langchain/security/advisories/GHSA-qh6h-p6c9-ff54>
- <https://github.com/langchain-ai/langchain/commit/27add913474e01e33bededf4096151130ba0d47c>
- <https://github.com/langchain-ai/langchain/releases/tag/langchain-core==1.2.22>
- <https://access.redhat.com/errata/RHSA-2026:24766>
- <https://access.redhat.com/errata/RHSA-2026:37275>
- <https://access.redhat.com/errata/RHSA-2026:59159>
- <https://access.redhat.com/security/cve/CVE-2026-34070>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2453287>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34070.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34070) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_