CVE-2026-9198ExploitPublished 2 Sep 2026

Langflow 1.10.0 · RCE

Affects IBM LangflowSource Exploit-DB RSS Feed

Authoritative record:CVE-2026-9198· Critical 9.8

Exploited in the wild · KEV due 7 Aug 2026 · public exploit available (Metasploit, Exploit-DB) · 28% EPSS : upgrade to 1.10.0 now.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score

9.8Critical

How severe the flaw is on the 0–10 CVSS scale.

KEV deadline: 7 Aug 2026 US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
EPSS: 28.6% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 1.10.0

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 17 Jul 2026
Detectable: evidence found.
nuclei template: IBM Langflow - Remote Code Execution
Weaponized: evidence found.
1 Metasploit module · 1 Exploit-DB entry, 47 days after disclosure
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 18 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by IBM Corporation
21 May 202615:40 UTC, 57 days before disclosure
CVE published
on cve.org
17 Jul 202617:36 UTC, t = 0
In Threat Radar
record ingested
18 Jul 202608:58 UTC, 15 hours after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed
4 Aug 2026, 18 days after disclosure
KEV remediation due
US federal deadline
7 Aug 2026, 21 days after disclosure
First Exploit-DB entry (opens in a new tab)
Langflow 1.10.0 - RCE
2 Sep 2026, 47 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade IBM Langflow to 1.10.0.

Affected software

Product	Affected	Fixed in
PyPIlangflow`pkg:pypi/langflow`Other threats	Affected <1.10.0	Fixed in 1.10.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

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.

Description

Langflow versions prior to 1.10.0 contain a remote code execution (RCE) vulnerability identified as CVE-2026-9198. An exploit exists that leverages an API endpoint to obtain a superuser token and then executes arbitrary code on the target system. The exploit has been tested on Ubuntu 22.04.

Impact

Successful exploitation of this vulnerability allows an attacker to execute arbitrary commands on the affected system with superuser privileges. This can lead to full system compromise, data theft, or disruption of services. The exploit code is publicly available, increasing the risk of exploitation, although no active exploitation in the wild has been reported yet.

Mitigation

Until then, restrict access to the vulnerable API endpoints and monitor for suspicious activity.

Public tooling indexed from Metasploit Framework, Exploit-DB, ProjectDiscovery nuclei-templates and PoC-in-GitHub. Its existence raises the odds of exploitation; it does not confirm attacks.

CWE-94Improper Control of Generation of Code (Code Injection) (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #10OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
Architecture and Design · Refactoring
Refactor your program so that you do not have to dynamically generate code.
Architecture and Design
Run your code in a "jail" or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which code can be executed by your product.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
OWASP Cheat Sheets
Server Side Request Forgery Prevention (opens in a new tab)
Unvalidated Redirects and Forwards (opens in a new tab)
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
OWASP ASVS 4.0.3
V5.2.8 (opens in a new tab)
V5.2.5 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
Leverage Executable Code in Non-Executable Files (opens in a new tab)
Manipulating User-Controlled Variables (opens in a new tab)
Code Injection (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

Indicators of compromise

Exploit source code

Exploit code for Langflow 1.10.0 - RCE2,019 characters

# Exploit Title:  Langflow 1.10.0 - RCE
# Exploit Author: Richard Howe <rhowe425>
# Vendor Homepage: https://www.langflow.org/
# Software Link: https://www.langflow.org/desktop
# Version: < 1.10.0
# Tested on: Ubuntu 22.04
# CVE : CVE-2026-9198

import argparse
from requests import get, post


def stage1(base_url: str) -> str:
    endpoint = '/api/v1/auto_login'
    headers = {
        'Content-Type': 'application/json',
    }

    try:
        resp = get(base_url + endpoint)
    except Exceptio…

References

Community reviews

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Exploitation evidence

Timeline

What to do

Affected software

Description

AI analysisMachine-generated, updated 25 Oct 2026, 03:07 UTC

Public exploits and detection1 Metasploit module, 1 Exploit-DB entry, a Nuclei detection template, GitHub proofs of concept

WeaknessesCWE-94

Technical details

Indicators of compromise

Exploit source code

References

Community reviews

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