LowVulnerability

CVE-2026-6600: Langflow cross site scripting in chat message editing component

Source: NVD(opens in a new tab)
Identifier: CVE-2026-6600
Published: April 20, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.3%

Summary

CVE-2026-6600 is a flaw in langflow-ai langflow up to 1.8.3, in the Frontend React Component Rendering component, specifically the file src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit-message.tsx. Manipulating this function can lead to cross site scripting, and the attack may be launched remotely. A published exploit exists, and the vendor did not respond to early contact about the disclosure.

Mitigation

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

Details

Scores and exploitation

CVSS score: 3.5(low)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Attack vector: network
Attack complexity: low
Privileges required: low
User interaction: required
EPSS: 0.3%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on October 13, 2026.
Disclosure date: April 20, 2026

Weaknesses and techniques

Weakness (CWE): CWE-79
CWE-94
Attack pattern (CAPEC): CAPEC-198
CAPEC-242
CAPEC-86

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: 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-2026-6600

First tracked: April 20, 2026 at 08:18 AM ET, from NVD/CVE Database

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

Classifier confidence: 85% (self-assessed)

Summary

Mitigation

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