CVE-2026-6600

langflow-ai langflow Frontend React Component Rendering edit-message.tsx cross site scripting

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Published Apr 20, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
A flaw has been found in langflow-ai langflow up to 1.8.3. This affects an unknown function of the file src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit-message.tsx of the component Frontend React Component Rendering. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Analysis

AI-generated

Technical impact

A flaw in langflow‑ai's Langflow up to version 1.8.3 allows a malicious user to inject arbitrary scripts into the edit‑message component when the unknown function is executed. The attack requires the ability to manipulate data that is rendered by the frontend, and can be launched remotely. The resulting cross‑site scripting can lead to execution of attacker code in users’ browsers, enabling cookie theft, session hijacking, and defacement. The weakness is identified as CWE‑79.

Affected Systems

langflow‑ai’s Langflow, versions up to 1.8.3, specifically the file src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit‑message.tsx in the frontend React component rendering.

Risk and Exploitability

The CVSS score of 5.1 indicates moderate severity, and no EPSS data is available. The vulnerability is not listed in the CISA KEV catalog. Attackers can remotely exploit the flaw by manipulating data sent to the edit‑message component. Published exploits indicate that the flaw can be used to inject and execute arbitrary scripts in the victim’s browser context.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade to the latest Langflow release where the known XSS issue is resolved.
  • Apply a strict Content Security Policy that restricts execution of inline scripts and disables unsafe eval.
  • Ensure that any user‑supplied data displayed by the edit‑message component is properly sanitized or escaped before rendering; for React, use built‑in escaping or a library such as DOMPurify.

Generated by OpenCVE AI on April 20, 2026 at 05:25 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
Type Values Removed Values Added
Description A flaw has been found in langflow-ai langflow up to 1.8.3. This affects an unknown function of the file src/frontend/src/modals/IOModal/components/chatView/chatMessage/components/edit-message.tsx of the component Frontend React Component Rendering. Executing a manipulation can lead to cross site scripting. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Title langflow-ai langflow Frontend React Component Rendering edit-message.tsx cross site scripting
First Time appeared Langflow
Langflow langflow
Weaknesses CWE-79
CWE-94
CPEs cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*
Vendors & Products Langflow
Langflow langflow
References
Metrics cvssV2_0

{'score': 4, 'vector': 'AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 3.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P'}
Weaknesses
  • CWE-79

    Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

  • CWE-94

    Improper Control of Generation of Code ('Code Injection')

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
Apr 20, 2026, 2:54 PM
Reserved
Apr 19, 2026, 1:47 PM

View source JSON

Updated
Apr 20, 2026, 2:42 PM

JSON

Status
Deferred
Published
Apr 20, 2026, 4:16 AM
Modified
Oct 25, 2026, 11:10 PM

View source JSON

No data.

Updated
Apr 20, 2026, 2:45 PM

JSON