UNKNOWNhex →
Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute
Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute
Affected packages
- mdex
- mdex_native
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/leandrocp/mdex_native/security/advisories/GHSA-v664-pmxr-mxxx
- https://cna.erlef.org/cves/CVE-2026-53427.html
- https://github.com/leandrocp/mdex_native/commit/798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3
- https://hex.pm/packages/mdex
- https://hex.pm/packages/mdex_native
Structured record: https://osv.dev/vulnerability/EEF-CVE-2026-53427
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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