CriticalVulnerability

CVE-2026-19295: IBM Langflow OSS flow save and build allows OS command execution

Source: NVD(opens in a new tab)
Identifier: CVE-2026-19295
Published: August 28, 2026
Record updated: October 25, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 1.6%

Summary

IBM Langflow OSS 1.0.0 through 1.11.1 contains a flaw that lets an authenticated attacker run arbitrary operating system commands in the server process. The attacker saves a flow with a crafted type field value, then triggers a build of a wrapper flow that references it. This escalates privileges from authenticated flow user to OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 9.9(critical)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector: network
Attack complexity: low
Privileges required: low
User interaction: none
EPSS: 1.6%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.
Disclosure date: August 28, 2026

Weaknesses and techniques

Weakness (CWE): CWE-95
Attack pattern (CAPEC): CAPEC-242

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Framework
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-19295

First tracked: August 28, 2026 at 08:08 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 95% (self-assessed)

Summary

Mitigation

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