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Vulnerabilities CVE-2026-55255

CVE-2026-55255

Medium
Open
KEV
TLP:CLEAR

Langflow Authorization Bypass Through User-Controlled Key Vulnerability

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Description

Langflow — Langflow — Langflow contains an authorization bypass through user-controlled key vulnerability which allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request.

Details

EPSS Score
29.05%

98th percentile

Confidence
100%
CISA KEV
Date Added
Jul 7, 2026
Patch Due
Jul 10, 2026
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
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