---
id: CVE-2026-73529
title: >-
  Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate
  limiting vulnerability that allows unauthenticated attackers to send unbounded
  login requests to the POST /v1/sessions endpoint due to dead code in
  App\Http\Kernel.…
summary: >-
  Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate
  limiting vulnerability that allows unauthenticated attackers to send unbounded
  login requests to the POST /v1/sessions endpoint due to dead code in
  App\Http\Kernel.…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-307
published: '2026-08-18'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T13:42:45.350'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73529'
references:
  - url: >-
      https://github.com/alextselegidis/plainpad/commit/d3823fc595b5d8f842a6fd7dfe49b7852a10fdac
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/plainpad-missing-rate-limiting-via-post-v1-sessions
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00409
epssPercentile: 0.32406
ingestedAt: '2026-09-16T13:56:12.592Z'
---

## Overview

Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate limiting vulnerability that allows unauthenticated attackers to send unbounded login requests to the POST /v1/sessions endpoint due to dead code in App\Http\Kernel.php that is never instantiated under the Laravel 11+ skeleton, leaving the API throttle configuration unattached to any route. Attackers can exploit this by sending unlimited credential attempts with no lockout or CAPTCHA enforcement, and additionally trigger CPU exhaustion by forcing repeated bcrypt comparisons on each request.

## Remediation

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