Description
league/commonmark is a PHP Markdown parser. From version 2.3.0 to before version 2.8.2, the DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing hostname boundary assertion in the domain-matching regex. An attacker-controlled domain like youtube.com.evil passes the allowlist check when youtube.com is an allowed domain. This issue has been patched in version 2.8.2.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| commonmark | 2.3.0 | 2.8.2 |
| league/commonmark | 2.3.0 | 2.8.2 |
References
Similar Threats
- Medium CVE-2026-30838
- Unknown MAL-2024-6841
- High GHSA-c2v4-chx5-vff6
- Unknown RSEC-2023-6
- Unknown RSEC-2023-7
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