Threat landscape
high

Langflow OSS: Mehrere Schwachstellen

WID-SEC-2026-3239 · first 09.09.2026 · updated 15.09.2026 · CVSS 9,8

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What it is about

Langflow bietet eine visuelle Schnittstelle zum Erstellen von LLM-basierten Anwendungen. Ein Angreifer kann mehrere Schwachstellen in Langflow OSS ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, erweiterte Berechtigungen zu erlangen oder sensible Informationen offenzulegen.

Under what conditions?

The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.

What can happen in the worst case

An attacker could use the vulnerability to

  • beliebigen Code auszuführen
  • Sicherheitsmaßnahmen zu umgehen
  • Daten zu manipulieren
  • erweiterte Berechtigungen zu erlangen oder sensible Informationen offenzulegen

Am I affected?

Affected according to the BSI:

  • Open Source Langflow OSS <1.11.0
  • Open Source Langflow OSS <1.11.6

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

  • Open Source Langflow OSS 1.11.0
  • Open Source Langflow OSS 1.11.6

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

CVE: CVE-2026-12763, CVE-2026-12767, CVE-2026-76059, CVE-2026-78569, CVE-2026-78571, CVE-2026-78575, CVE-2026-79723, CVE-2026-79724, CVE-2026-79725, CVE-2026-79742, CVE-2026-81204, CVE-2026-81211, CVE-2026-81213, CVE-2026-81265, CVE-2026-81268, CVE-2026-81940, CVE-2026-81941, CVE-2026-85025, CVE-2026-9225, CVE-2026-9596 …

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.

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