CVE-2026-10546: DNS Rebinding TOCTOU Bypass of SSRF Protection in Langflow OSS URL Component

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-30 · updated 2026-10-25
Weakness: CWE-918

Description

IBM Langflow OSS 1.0.0 through 1.9.3 contains a Server-Side Request Forgery (SSRF) vulnerability in the URL component ( src/lfx/src/lfx/components/data_source/url.py ) due to a Time-of-Check/Time-of-Use (TOCTOU) race condition that can be exploited via DNS rebinding.

Affected products

IBM Langflow OSS: from 1.0.0 through 1.9.3

References

https://www.ibm.com/support/pages/node/7277560

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