Report · Exploit-DB RSS FeedAbout CVE-2026-5027Published 31 Aug 2026

Langflow 1.8.4 · Path Traversal to Remote Code Execution

Affects langflowSource Exploit-DB RSS Feed

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Authoritative record:CVE-2026-5027· High 8.8

Public exploit available (Exploit-DB) · 39% EPSS · CVSS 8.8 High.

Data as of 30 Oct 2026, 11:34 UTC

CVSS 3.1 base score

8.8High

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

EPSS: 39.9% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
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: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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 27 Mar 2026
Detectable: evidence found.
nuclei template: Langflow <= 1.8.4 - Path Traversal to RCE via File Upload
Weaponized: evidence found.
1 Exploit-DB entry, 157 days after disclosure
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

CVE ID reserved
by Tenable Network Security, Inc.
27 Mar 202614:51 UTC, 3 minutes before disclosure
CVE published
on cve.org
27 Mar 202614:54 UTC, t = 0
In Threat Radar
record ingested
27 Mar 202615:14 UTC, 20 minutes after disclosure
First Exploit-DB entry (opens in a new tab)
Langflow 1.8.4 - Path Traversal to Remote Code Execution
31 Aug 2026, 157 days after disclosure

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 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

Affected software

Product	Affected	Fixed in
PyPIlangflow`pkg:pypi/langflow`Other threats	Affected <=1.8.4	Fixed in–

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

AI-suggested

Until an official fix is available, restrict access to Langflow instances, especially from untrusted networks, and monitor for suspicious activity related to file path manipulation.

Description

Langflow version 1.8.4 contains a critical vulnerability that allows path traversal leading to remote code execution (RCE). This flaw enables an attacker to execute arbitrary code on the affected system by exploiting improper handling of file paths.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely, potentially leading to full system compromise of the host running Langflow 1.8.4 or earlier. This poses a critical security risk to affected environments.

Summary

The vulnerability in Langflow 1.8.4 involves a path traversal issue that can be leveraged to achieve remote code execution. This means an attacker can manipulate file paths to access unauthorized files or execute code remotely on the host running Langflow. The affected version is 1.8.4 and earlier. No detailed technical specifics or exploit code are provided in the source data.

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.

Indicators of compromise

Exploit source code

Exploit code for Langflow 1.8.4 - Path Traversal to Remote Code Execution6,231 characters

# Exploit Title: Langflow  1.8.4 - Path Traversal to Remote Code Execution 
# Google Dork: N/A
# Date: 2026-07-20
# Exploit Author: cardosource
# Vendor Homepage: https://www.langflow.org/
# Software Link: https://github.com/langflow-ai/langflow
# Version: <= 1.8.4
# Tested on: Docker - Ubuntu 22.04 + Langflow 1.8.4
# CVE: CVE-2026-5027

"""
Langflow <= 1.8.4 - CVE-2026-5027
Path Traversal leading to Remote Code Execution (RCE)

The vulnerability allows an authenticated attacker to abuse a path …

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 Exploit-DB entry, a Nuclei detection template, GitHub proofs of concept

Technical details

Indicators of compromise

Exploit source code

References

Community reviews

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