LangChain: Schwachstelle ermöglicht Offenlegung von Informationen
WID-SEC-2026-0896 · first 27.03.2026 · updated 10.07.2026 · CVSS 7,5
What it is about
LangChain ist ein Open-Source-Framework, das die Entwicklung von Anwendungen mit großen Sprachmodellen (LLMs) erleichtert Ein entfernter, anonymer Angreifer kann eine Schwachstelle in LangChain ausnutzen, um Informationen offenzulegen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Red Hat Ansible Automation Platform 2.5
- Red Hat Enterprise Linux
- Open Source LangChain <1.2.22
- IBM MQ Agent
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source LangChain 1.2.22
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Github Secuity Advisory vom 2026-03-26 github.com
- IBM Security Bulletin 7273338 vom 2026-05-18 www.ibm.com
- Red Hat Security Advisory RHSA-2026:24766 vom 2026-06-09 access.redhat.com
- Red Hat Security Advisory RHSA-2026:37275 vom 2026-07-09 access.redhat.com
CVE: CVE-2026-34070
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.