High 8.2Published Mar 13, 2026

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

Updated under an hour ago (Oct 26, 2026, 10:50 PM ET)

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It affects kasuganosoras Pigeon. Add what you run to find out whether that includes you.

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Every CVE for kasuganosoras Pigeon

Exploited in the last 30 days

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.

CVSS: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Weakness (CWE): CWE-74
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Mar 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kasuganosoras Pigeon kasuganosoras:pigeon (from the name)	before 1.0.201	CNA record

References

References

https://github.com/kasuganosoras/Pigeon/security/advisories/GHSA-rrj4-9wgq-prcr	x-refsource-confirm
https://github.com/kasuganosoras/Pigeon/releases/tag/1.0.201	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.