---
id: CVE-2026-50787
title: >-
  e-SIC Livre (esiclivre) v0.2.2 and earlier contains an uncontrolled resource
  consumption vulnerability in restrito/inc/captcha.php
summary: >-
  e-SIC Livre (esiclivre) v0.2.2 and earlier contains an uncontrolled resource
  consumption vulnerability in restrito/inc/captcha.php. The application uses
  user-supplied parameters (l, a, tf, ql) without validation to generate CAPTCHA
  image…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: adp
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-26T17:37:45.538466Z'
exploitAvailable: true
published: '2026-10-23'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T17:37:58.399Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-50787'
references:
  - url: >-
      https://github.com/esiclivre/esiclivre/blob/master/restrito/inc/captcha.php
  - url: 'https://github.com/brynax/CVE-2026-50787'
tags:
  - cve.org
  - exploit-available
epss: 0.0049
epssPercentile: 0.41948
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/brynax/CVE-2026-50787'
  checkedAt: '2026-10-27T19:02:28.443Z'
ingestedAt: '2026-10-23T16:31:11.327Z'
---

## Overview

e-SIC Livre (esiclivre) v0.2.2 and earlier contains an uncontrolled resource consumption vulnerability in restrito/inc/captcha.php. The application uses user-supplied parameters (l, a, tf, ql) without validation to generate CAPTCHA images, allowing remote attackers to cause denial of service via excessive memory and CPU consumption.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.