---
id: CVE-2026-15689
title: >-
  Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow
  password reset link poisoning via the request Host header in
  _default_email_password_reset and _default_welcome_send.


  Both default emails emit a link of the form `$…
summary: >-
  Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow
  password reset link poisoning via the request Host header in
  _default_email_password_reset and _default_welcome_send.


  Both default emails emit a link of the form `$…
severity: none
cwe:
  - CWE-640
published: '2026-08-15'
updated: '2026-08-15'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15689'
references:
  - url: >-
      https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1031-1053
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: >-
      https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1097-1121
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: >-
      https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.712/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-194
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: >-
      https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/changes
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: >-
      https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-196
    label: 9b29abf9-4ab0-4765-b253-1875cd9b441e
  - url: 'http://www.openwall.com/lists/oss-security/2026/08/15/4'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
ingestedAt: '2026-08-16T13:39:02.761Z'
epss: 0.00837
epssPercentile: 0.55915
---

## Overview

Dancer2::Plugin::Auth::Extensible versions through 0.713 for Perl allow password reset link poisoning via the request Host header in _default_email_password_reset and _default_welcome_send.

Both default emails emit a link of the form `$base/login/$code`, whose authority comes from the request Host header, or from X-Forwarded-Host under behind_proxy (obtained from Dancer2's request->base function). A POST to /login carrying submit_reset and a username needs no authentication: it stores a fresh reset code against that account and mails the account holder a link to a host of the sender's choosing. The welcome mail takes the same path when the application calls create_user with email_welcome set.

Through 0.711 the handlers read `request->uri_base` and `request->base` directly; Versions 0.712 and later provide an uri_base configuration key that defaults to the untrusted `request->uri_base` when unset.

The default configuration with reset_password_handler enabled and the default message text, a recipient who follows the link hands a working reset code to the sender's host, which is enough to take over the account.

## Remediation

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