CVE-2026-49400
1 advisory.
Packagist/october/system CVE-2026-49400: low 3.3
October CMS: PHP Object Injection via Backend Widget Session Storage
Action: Upgrade october/system to 3.7.17 or later.
composer require october/system:3.7.17composer require october/system:4.2.23Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.7.17 | - |
| 4.0.0 | 4.2.23 | - |
Fixed versions
| 3.7.17 | 4.2.23 |
Sources
- osv: GHSA-2ff2-mx52-q8wp
- https://github.com/octobercms/october/security/advisories/GHSA-2ff2-mx52-q8wp
- https://github.com/octobercms/october
CVE-2026-49400 · published · modified · JSON