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Vulnerability record · CVE-2026-19295 · published 28 August 2026

CVE-2026-19295: Langflow vulnerability

Langflow · Langflow

IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

9.9 CVSS 3.1 Critical EPSS 3.3% · top 12.1% CWE-95 · CWE-95
9.9CVSS 3.1 base score
3.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
1 Sep 2026Last modified by NVD

Description

IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.ibm.com/support/pages/node/7284733 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-9198Langflow auto_login and code validation chain enables unauthenticated RCEIBM Langflow OSS 1.0.0 through 1.10.0 exposes /api/v1/auto_login, which mints SUPERUSER tokens to any network caller, and /api/v1/validate/code, whic…KEVEPSS 29%analysed9.8CVE-2026-0770Langflow validate endpoint exec_globals remote code executionLangflow mishandles the exec_globals parameter passed to its validate endpoint, allowing functionality from an untrusted control sphere to be include…KEVEPSS 64%analysed9.8CVE-2025-3248Langflow unauthenticated code injection in validate/code endpointLangflow versions prior to 1.3.0 expose the /api/v1/validate/code endpoint without authentication, allowing code injection. A remote attacker can sen…KEVEPSS 100%analysed9.4CVE-2025-34291Langflow CORS misconfiguration leads to token theft and RCELangflow up to and including 1.6.9 ships an overly permissive CORS configuration (allow_origins='*' with allow_credentials=True) and a refresh token …KEVEPSS 93%analysed9.3CVE-2026-33017Langflow build_public_tmp endpoint unauthenticated remote code executionLangflow versions prior to 1.9.0 expose the POST /api/v1/build_public_tmp/{flow_id}/flow endpoint without authentication, and when the optional data …KEVEPSS 25%analysed8.4CVE-2026-55255Langflow IDOR in responses endpoint allows cross-user flow executionLangflow before 1.9.1 has an insecure direct object reference in the /api/v1/responses endpoint. An authenticated attacker can supply another user's …KEVEPSS 0.89%analysed10.0CVE-2026-10134Langflow code injection vulnerabilityIBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read and modify every flow, conversat…EPSS 0.64%10.0CVE-2026-10561Langflow code injection vulnerabilityIBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass tha…EPSS 1.0%

Source: NIST National Vulnerability Database (record CVE-2026-19295), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.