Packagist/league/commonmark CVE-2026-86434: high 7.5
league/commonmark: Denial of service via colliding heading slugs
Action: Upgrade league/commonmark to 2.9.0 or later.
composer require league/commonmark:2.9.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 2.0.0 | 2.9.0 | - |
Fixed versions
| 2.9.0 |
Sources
- osv: GHSA-mh25-x5hq-wrqp
- https://github.com/thephpleague/commonmark/security/advisories/GHSA-mh25-x5hq-wrqp
- https://github.com/thephpleague/commonmark
- https://github.com/thephpleague/commonmark/releases/tag/2.9.0
CVE-2026-86434 · published · modified · JSON