---
title: "CVE-2026-9198: IBM Langflow Code Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-9198/
description: "CVE-2026-9198 (IBM Langflow): Exploited in the wild (CISA KEV). IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-07-17
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-9198"
kev: true
cvss: 9.8
epss: 0.28658
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-9198: IBM Langflow Code Injection Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run IBM Langflow. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-08-04, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-08-07 ; treat that as the outer limit, not the target.
- EPSS 28.7% , percentile 98: FIRST’s model estimates a 28.7% chance of exploitation activity in the next 30 days, higher than 98% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Act now. Langflow CVE-2026-9198: Exploited Unauthenticated RCE — Langflow is now the most repeatedly exploited AI-agent builder on CISA's list; any network-reachable instance below 1.10.1 should be patched today and checked for compromise.

## What it is

IBM Langflow OSS 1.0.0 through 1.10.0 allows unauthenticated attackers to chain /api/v1/autologin (mints SUPERUSER tokens to any network caller) with /api/v1/validate/code (executes user code via exec()) to achieve full RCE on default Langflow deployments

## Affected products (CVE record)

- IBM Langflow OSS: 1.0.0 <= 1.10.0

## Severity

- ibm CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-08-04; federal due date 2026-08-07. Known ransomware use: Unknown.
- CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 28.66% probability of exploitation activity in the next 30 days; percentile 98.

## Sources

- [ibm.com](https://www.ibm.com/support/pages/node/7278927)
- [CVE.org record CVE-2026-9198](https://www.cve.org/CVERecord?id=CVE-2026-9198)
- [NVD entry CVE-2026-9198](https://nvd.nist.gov/vuln/detail/CVE-2026-9198)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-9198)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk)
- [Listed in CISA KEV notes (cisa.gov)](https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk)

---
Source page: https://erroneo.us/security/cve/CVE-2026-9198/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt