CVE-2026-26747
- State
- Published
- Severity
- 9.1 Critical
- Published
- Feb 20, 2026
- Updated
- Feb 23, 2026
- Reserved
- Feb 16, 2026
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,
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | CISA-ADP |
Weaknesses
- CWE-644 Improper Neutralization of HTTP Headers for Scripting Syntax
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
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