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archive/Patch now/AIR-2026-1330
closedclosed 4 Sep 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-19306: IBM Langflow OSS arbitrary file read and data exfiltration

Langflow

A path traversal vulnerability in IBM Langflow OSS lets authenticated attackers read sensitive system files and exfiltrate them via model prompts. The vendor has disclosed the vulnerability with no confirmed active exploitation.

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
7.7
EPSS
0.01 · top 54% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
4 Sep 2026
last update
4 Sep 2026
CVE ids
CVE-2026-19306other records

Timeline · 1

  1. 4 Sep 2026CVE-2026-19306: IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem —…

Sources · 1

Advisories and databases

  1. 2026-09-04
    CVE-2026-19306: IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem —…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-19306

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 vulnerabilityData leak
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM02:2025 Sensitive Information DisclosureLLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
path-traversaldata-leak
dates
happened 4 Sep 2026 · first reported 4 Sep 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-2026-19306: IBM Langflow OSS arbitrary file read and data exfiltration

https://gcdradar.vercel.app/incidents/cve-2026-19306-ibm-langflow-oss-arbitrary-file-read-and-data · AIR-2026-1330 · closed 2026-09-04

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-09-04
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-19306
- CVSS: 7.7

## Summary

A path traversal vulnerability in IBM Langflow OSS lets authenticated attackers read sensitive system files and exfiltrate them via model prompts. The vendor has disclosed the vulnerability with no confirmed active exploitation.

## What to do

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

## Latest updates

- 2026-09-04: CVE-2026-19306: IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem —… (https://nvd.nist.gov/vuln/detail/CVE-2026-19306)

## Sources

- 2026-09-04 NVD: CVE-2026-19306: IBM Langflow OSS 1.0.0 through 1.11.2 allows an authenticated attacker to read arbitrary files from the server filesystem —… https://nvd.nist.gov/vuln/detail/CVE-2026-19306

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

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