CVE-2026-86431
1 advisory.
Packagist/league/commonmark CVE-2026-86431: high 7.2, EPSS 0.39%
league/commonmark XSS: `on*` event-handler filter in `AttributesExtension` bypassed with a U+000C form feed
Action: Upgrade league/commonmark to 2.9.1 or later.
composer require league/commonmark:2.9.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 2.7.0 | 2.9.1 | - |
Fixed versions
| 2.9.1 |
Sources
- osv: GHSA-f8fg-pg57-v4j8
- https://github.com/thephpleague/commonmark/security/advisories/GHSA-f8fg-pg57-v4j8
- https://github.com/thephpleague/commonmark/commit/dfcdf4554c16aa37c15e3a5ee3243ee26147c239
- https://github.com/thephpleague/commonmark
- https://github.com/thephpleague/commonmark/releases/tag/2.9.1
CVE-2026-86431 · published · modified · JSON