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CVE Vulnerability Details :
CVE-2026-55255
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-23 Jun, 2026 | 16:28
Updated At-23 Jun, 2026 | 17:32
Rejected At-
▼CVE Numbering Authority (CNA)
Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.2, an Insecure Direct Object Reference (IDOR) vulnerability in /api/v1/responses endpoint allows an authenticated attacker to execute any flow belonging to another user by specifying the victim's flow ID in the request. This vulnerability is fixed in 1.9.2.

Affected Products
Vendor
langflow-ai
Product
langflow
Versions
Affected
  • < 1.9.2
Problem Types
TypeCWE IDDescription
CWECWE-639CWE-639: Authorization Bypass Through User-Controlled Key
Type: CWE
CWE ID: CWE-639
Description: CWE-639: Authorization Bypass Through User-Controlled Key
Metrics
VersionBase scoreBase severityVector
3.19.9CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Version: 3.1
Base score: 9.9
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
x_refsource_CONFIRM
https://github.com/langflow-ai/langflow/pull/12832
x_refsource_MISC
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/langflow-ai/langflow/pull/12832
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
exploit
Hyperlink: https://github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
Resource:
exploit
Details not found