What is CVE-2026-32616?

CVE-2026-32616 is a high-severity vulnerability in Kasuganosoras Pigeon, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.2/10. Published 2026-03-16.

How severe is CVE-2026-32616?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Kasuganosoras Pigeon

CVE-2026-32616

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.

EPSS: 0.002 (11.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Kasuganosoras Pigeon — versions < 1.0.201

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-32616?: CVE-2026-32616 is a high-severity vulnerability in Kasuganosoras Pigeon, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 8.2/10. Published 2026-03-16.
How severe is CVE-2026-32616?: High severity. CVSS v3 base score is 8.2 out of 10.