Packagist/s9y/serendipity CVE-2026-39971: high 7.2, EPSS 0.30%
Serendipity has a Host Header Injection allows SMTP header injection via unvalidated HTTP_HOST in Message-ID email header
Action: Upgrade s9y/serendipity to 2.6.0 or later.
composer require s9y/serendipity:2.6.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 2.6.0 | - |
Fixed versions
| 2.6.0 |
Sources
- osv: GHSA-458g-q4fh-mj6r
- https://github.com/s9y/Serendipity/security/advisories/GHSA-458g-q4fh-mj6r
- https://nvd.nist.gov/vuln/detail/CVE-2026-39971
- https://github.com/s9y/Serendipity
- https://github.com/s9y/Serendipity/releases/tag/2.6.0
CVE-2026-39971 · published · modified · JSON