CVE-2024-9277: Langflow Inefficient Regular Expression Complexity Vulnerability

MODERATE
Advisory Identifier: GHSA-355v-2rjx-fpx7
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CVSS 3.5
CWE-1333
Published
Advisory Summary

CVE-2024-9277 is a MODERATE (CVSS 3.5) inefficient regular expression complexity vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Langflow libraries in the PyPI ecosystem. The issue involves inefficient regular expression complexity in langflow. Remediation is available in the latest vendor maintenance releases.

CVE-2024-9277 at a Glance

CVE Identifier CVE-2024-9277
GHSA Identifier GHSA-355v-2rjx-fpx7
Severity MODERATE
CVSS v3.1 Base Score 3.5
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Langflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 3.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2024-9277

To remediate this vulnerability, upgrade all affected Langflow dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

langflow fixed: Latest secure release 
pip install langflow>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show langflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2024-9277, inspect your installed packages using pip:

pip show langflow

Analyze the terminal output to locate any version of Langflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show langflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Langflow, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A vulnerability classified as problematic was found in Langflow up to 1.0.18. Affected by this vulnerability is an unknown functionality of the file \src\backend\base\langflow\interface\utils.py of the component HTTP POST Request Handler. The manipulation of the argument remaining_text leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2024-9277 Affected Langflow Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
langflow
pypi/langflow
PyPI
≤ 1.0.18

References

NVD — CVE-2024-9277 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-9277
Langflow Source Repository REPOSITORY
https://github.com/langflow-ai/langflow
Langflow Source Repository REPOSITORY
https://github.com/langflow-ai/langflow/blob/main/src/backend/base/langflow/interface/utils.py#L65
rumbling-slice-eb0.notion.site/remote-redos-in-htt... WEB
https://rumbling-slice-eb0.notion.site/Remote-Redos-in-https-github-com-langflow-ai-langflow-067159ced0d5494e91b06071384969c4?pvs=4
vuldb.com/ WEB
https://vuldb.com/?ctiid.278659
vuldb.com/ WEB
https://vuldb.com/?id.278659
vuldb.com/ WEB
https://vuldb.com/?submit.410043

Frequently Asked Questions

What is CVE-2024-9277?
CVE-2024-9277 is a security vulnerability in Langflow involving Inefficient Regular Expression Complexity in langflow under CWE-1333: Inefficient Regular Expression Complexity.
Which Langflow versions are affected?
Affected versions include releases prior to current release patches across affected packages: langflow.
What version fixes CVE-2024-9277?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is langflow affected?
Yes, langflow is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2024-9277?
CVE-2024-9277 has a CVSS v3.1 base score of 3.5 (MODERATE) with vector string CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2024-9277?
CVE-2024-9277 is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check PyPI dependencies for CVE-2024-9277?
Run the dependency tree command: 'pip show langflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-355v-2rjx-fpx7",
  "modified" : "2024-10-01T18:32:40Z",
  "published" : "2024-09-27T12:31:40Z",
  "aliases" : [ "CVE-2024-9277" ],
  "summary" : "Inefficient Regular Expression Complexity in langflow",
  "details" : "A vulnerability classified as problematic was found in Langflow up to 1.0.18. Affected by this vulnerability is an unknown functionality of the file \\src\\backend\\base\\langflow\\interface\\utils.py of the component HTTP POST Request Handler. The manipulation of the argument remaining_text leads to inefficient regular expression complexity. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
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    "score" : "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
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  } ],
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    },
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      } ]
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  "references" : [ {
    "type" : "ADVISORY",
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  }, {
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  "database_specific" : {
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  }
}