IBM Langflow Desktop und OSS: Mehrere Schwachstellen
WID-SEC-2026-1340 · first 04.05.2026 · updated 04.05.2026 · CVSS 8,8
What it is about
IBM LangChain Desktop ist eine lokale Anwendung zur Entwicklung und Ausführung von LangChain-basierten Anwendungen. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM Langflow Desktop ausnutzen, um beliebigen Code auszuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen.
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
- beliebigen Code auszuführen
- Daten zu manipulieren
- vertrauliche Informationen offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen
Am I affected?
Affected according to the BSI:
- IBM Langflow Desktop OSS <1.9.0
- IBM Langflow Desktop <1.9.0
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- IBM Langflow Desktop OSS 1.9.0
- IBM Langflow Desktop 1.9.0
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)
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
- IBM Security Bulletin vom 2026-05-03 www.ibm.com
CVE: CVE-2026-3340, CVE-2026-3345, CVE-2026-3346, CVE-2026-4502, CVE-2026-4503, CVE-2026-6542, CVE-2026-6543
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.