Ubuntu 20.04 — php-league-commonmark — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 19 January 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8194-1 Related CVEs: CVE-2026-33347 CVE-2025-46734 CVE-2026-30838 Upstream summary: It was discovered that league/commonmark did not properly restrict unsafe attributes when the Attributes extension was enabled. An attacker could possibly use […]