CVE-2026-32616 HIGH

CVE-2026-32616: Pigeon has a Host Header Injection in email verification flow

Vendor Kasuganosoras
Product Pigeon
Weakness CWE-74
Published March 13, 2026
Last update March 16, 2026
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

What the vulnerability does

01Description

Pigeon is a message board/notepad/social system/blog. Prior to 1.0.201, the application uses $_SERVER['HTTP_HOST'] without validation to construct email verification URLs in the register and resendmail flows. An attacker can manipulate the Host header in the HTTP request, causing the verification link sent to the user's email to point to an attacker-controlled domain. This can lead to account takeover by stealing the email verification token. This vulnerability is fixed in 1.0.201.

Key dates

02Disclosure timeline

March 13, 2026 CVE published
March 16, 2026 Record updated