HighVulnerability

CVE-2026-13448: IBM Langflow OSS unauthenticated code execution via public flow build endpoint

Source: NVD(opens in a new tab)
Identifier: CVE-2026-13448
Published: July 17, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.7%

Summary

CVE-2026-13448 affects IBM Langflow OSS versions 1.0.0 through 1.10.1. The public flow build endpoint at /api/v1/build_public_tmp/{flow_id}/flow allows unauthenticated remote code execution. The flaw is an incomplete denylist in validate_public_flow_no_code_execution(), which fails to block agent components including OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent.

Mitigation

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

Details

Scores and exploitation

CVSS score: 8.1(high)
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector: network
Attack complexity: high
Privileges required: none
User interaction: none
EPSS: 0.7%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 12, 2026.
Disclosure date: July 17, 2026

Classification

Attack type: Other
Attack sophistication: Trivial
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-2026-13448

First tracked: July 17, 2026 at 08:07 PM ET, from NVD/CVE Database

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

Classifier confidence: 93% (self-assessed)

Summary

Mitigation

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