CVE-2026-86428 | thephpleague commonmark up to 2.9.x AttributesExtension denial of service

A vulnerability described as problematic has been identified in thephpleague commonmark up to 2.9.x. Affected by this vulnerability is an unknown functionality of the component AttributesExtension. Executing a manipulation can lead to denial of service.

This vulnerability is handled as CVE-2026-86428. The attack can be executed remotely. There is not any exploit available.

Upgrading the affected component is recommended.VulDB Recent EntriesRead More