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CVE-2026-26747
Published: Feb 20, 2026
Modified: Feb 23, 2026
PUBLISHED
Description
A Host Header Poisoning vulnerability exists in Monica 4.1.2 due to improper handling of the HTTP Host header in app/Providers/AppServiceProvider.php, combined with the default misconfiguration where the "app.force_url" is not set and default is "false". The application generates absolute URLs (such as those used in password reset emails) using the user-supplied Host header. This allows remote attackers to poison the password reset link sent to a victim,
| Vendor | Product | Versions |
|---|---|---|
n/a | n/a | affected n/a |
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