CVE-2026-86434 | thephpleague commonmark up to 2.8.3 UniqueSlugNormalizer normalize denial of service

A vulnerability classified as problematic has been found in thephpleague commonmark up to 2.8.3. Affected by this issue is the function UniqueSlugNormalizer::normalize of the component UniqueSlugNormalizer. The manipulation leads to denial of service.

This vulnerability is uniquely identified as CVE-2026-86434. The attack is possible to be carried out remotely. No exploit exists.

It is recommended to upgrade the affected component.VulDB Recent EntriesRead More