---
id: CVE-2024-9277
aliases:
  - GHSA-355v-2rjx-fpx7
  - PYSEC-2026-1521
title: Inefficient Regular Expression Complexity in langflow
summary: Inefficient Regular Expression Complexity in langflow
severity: low
cvss: 3.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'
vendor: langflow
product: langflow
ecosystem: pip
affected:
  - langflow <= 1.0.18
published: '2024-09-27'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-355v-2rjx-fpx7'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2024-9277'
  - url: 'https://github.com/langflow-ai/langflow'
  - url: >-
      https://github.com/langflow-ai/langflow/blob/main/src/backend/base/langflow/interface/utils.py#L65
  - url: >-
      https://rumbling-slice-eb0.notion.site/Remote-Redos-in-https-github-com-langflow-ai-langflow-067159ced0d5494e91b06071384969c4?pvs=4
  - url: 'https://vuldb.com/?ctiid.278659'
  - url: 'https://vuldb.com/?id.278659'
  - url: 'https://vuldb.com/?submit.410043'
tags:
  - osv
  - pip
epss: 0.00963
epssPercentile: 0.60195
ingestedAt: '2026-07-08T18:25:44.672Z'
---

## Overview

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.

## Affected packages

- `langflow <= 1.0.18`

## Remediation

Refer to the advisory for the patched release.