Vulnerability · Published Aug 15, 2026 · Assigned by CPANSec
CVE-2026-15689Dancer2::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
Critical 9.8
In plain English
A critical-severity security flaw in Dancer2::Plugin::Auth::Extensible from ABEVERLEY. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ABEVERLEY | Dancer2::Plugin::Auth::Extensible | 0 – through 0.713 |
Weakness: CWE-640 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1031-1053
- https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.711/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L1097-1121
- https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.712/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-194
- https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/source/lib/Dancer2/Plugin/Auth/Extensible.pm#L178-196
- https://metacpan.org/release/ABEVERLEY/Dancer2-Plugin-Auth-Extensible-0.713/changes release-notes
- http://www.openwall.com/lists/oss-security/2026/08/15/4