CVE-2025-34291Langflow <= 1.6.9 CORS Misconfiguration to Token Hijack & RCE
Bekannt ausgenutzt — Langflow Origin Validation Error Vulnerability
CISA hat am 21.05.2026 bestätigt, dass diese Schwachstelle in echten Angriffen genutzt wird. Frist für US-Bundesbehörden: 04.06.2026.
Erforderliche Maßnahme: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/langflow-ai/langflow ; https://github.com/langflow-ai/langflow/releases/tag/v1.9.3; https://github.com/langflow-ai/langflow/issues/11465#event-25774545848 ; https://nvd.nist.gov/vuln/detail/CVE-2025-34291
Beschreibung
Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-origin requests that include credentials and successfully call the refresh endpoint. An attacker-controlled origin can therefore obtain fresh access_token / refresh_token pairs for a victim session. Obtained tokens permit access to authenticated endpoints — including built-in code-execution functionality — allowing the attacker to execute arbitrary code and achieve full system compromise.
Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.
Betroffene Produkte und Versionen
Referenzen und Patches
- https://www.obsidiansecurity.com/blog/cve-2025-34291-critical-account-takeover-and-rce-vulnerability-in-the-l… technical-descriptionexploitExploitMitigation
- https://github.com/langflow-ai/langflow productProduct
- https://www.vulncheck.com/advisories/langflow-cors-misconfiguration-to-token-hijack-and-rce third-party-advisoryThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-34291 US Government Resource
- https://www.crowdsec.net/vulntracking-report/cve-2025-34291 Third Party Advisory
CPE-Treffer (NVD) (1)
cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*≤ 1.6.9