MediumVulnerability

CVE-2026-3346: IBM Langflow Desktop stored cross-site scripting in the Web UI

Source: NVD(opens in a new tab)
Identifier: CVE-2026-3346
Published: April 30, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.2%

Summary

CVE-2026-3346 affects IBM Langflow Desktop versions 1.6.0 through 1.8.4. An authenticated user can embed arbitrary JavaScript in the Web UI, altering its intended functionality and potentially leading to credentials disclosure within a trusted session. The source lists CWE-89 (SQL Injection) as the weakness, and NVD had not yet provided an assessment at the time of publication on 04/30/2026.

Mitigation

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

Details

Scores and exploitation

CVSS score: 6.4(medium)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector: network
Attack complexity: low
Privileges required: low
User interaction: none
EPSS: 0.2%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 8, 2026.
Disclosure date: April 30, 2026

Weaknesses and techniques

Weakness (CWE): CWE-89
Attack pattern (CAPEC): CAPEC-66

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Framework
Impact: Confidentiality,
Integrity
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-2026-3346

First tracked: May 1, 2026 at 02:07 AM ET, from NVD/CVE Database

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

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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