CVE-2026-53429

Affected software: mdex (0.11.0–0.12.3) and mdex_native (0.1.0–0.2.3). Root cause: native rendering path leaks memory by Box::leak of literal strings for each MDEx.EscapedTag node, with no cap on literal size or node count, causing unbounded memory growth per render and across renders. Trigger: r...

EEF-CVE-2026-53429 Unbounded native memory leak in mdex escaped-tag rendering enables unauthenticated denial of service

Summary Missing Release of Memory after Effective Lifetime vulnerability in leandrocp mdex and mdex\native allows an attacker who controls a rendered document to cause a denial of service through unbounded native memory exhaustion. The native rendering code permanently leaks memory when rendering...