gcdRadar
archive/Patch now/AIR-2026-1033
closedclosed 20 Apr 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-6600: Cross-site scripting vulnerability in langflow-ai langflow frontend

langflow

A cross-site scripting flaw was discovered in the frontend React component rendering of langflow-ai langflow up to version 1.8.3. The vulnerability can be exploited remotely via crafted message manipulation.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
3.5
EPSS
<0.01 · top 91% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
20 Apr 2026
last update
20 Apr 2026
CVE ids
CVE-2026-6600other records

Timeline · 1

  1. 20 Apr 2026CVE-2026-6600: A flaw has been found in langflow-ai langflow up to 1.8.3.

Sources · 1

Advisories and databases

  1. 2026-04-20
    CVE-2026-6600: A flaw has been found in langflow-ai langflow up to 1.8.3.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-6600

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
xsslangflow
dates
happened 20 Apr 2026 · first reported 20 Apr 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-6600: Cross-site scripting vulnerability in langflow-ai langflow frontend

https://gcdradar.vercel.app/incidents/cve-2026-6600-cross-site-scripting-vulnerability-in-langflow · AIR-2026-1033 · closed 2026-04-20

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-04-20
- AI role: Attack on AI
- Products: langflow
- CVE ids: CVE-2026-6600
- CVSS: 3.5

## Summary

A cross-site scripting flaw was discovered in the frontend React component rendering of langflow-ai langflow up to version 1.8.3. The vulnerability can be exploited remotely via crafted message manipulation.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-04-20: CVE-2026-6600: A flaw has been found in langflow-ai langflow up to 1.8.3. (https://nvd.nist.gov/vuln/detail/CVE-2026-6600)

## Sources

- 2026-04-20 NVD: CVE-2026-6600: A flaw has been found in langflow-ai langflow up to 1.8.3. https://nvd.nist.gov/vuln/detail/CVE-2026-6600

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

Related

  1. closed7.3
    Langflow CVE-2026-6596: Unrestricted file upload vulnerability in langflow-ai langflow

    Patch now · Disclosed · since 20 Apr 2026 · CVE-2026-6596

    AI
  2. closed2.7
    Langflow CVE-2026-6597: Langflow Information Leak via API Key Redaction

    Patch now · Disclosed · since 20 Apr 2026 · CVE-2026-6597

    AI
  3. closed5.3
    Langflow CVE-2026-12822: Code injection vulnerability in Langflow URL loader

    Patch now · Disclosed · since 22 Jun 2026 · CVE-2026-12822

    AI
  4. closed7.5
    Langflow Langflow unauthenticated IDOR vulnerability on image downloads

    Patch now · Disclosed · since 20 Mar 2026 · updated 24 Mar 2026 · CVE-2026-33484

    AI
  5. closed8.7
    Langflow Langflow profile picture endpoint path traversal vulnerability

    Patch now · Disclosed · since 20 Mar 2026 · updated 24 Mar 2026 · CVE-2026-33497

    AI
  6. closed7.7
    Flowise CVE-2026-56268: Flowise cross-workspace chatflow information disclosure

    Patch now · Disclosed · since 20 May 2026 · updated 22 Jun 2026 · CVE-2026-56268

    AI