CVE-2026-54888

Uncontrolled Recursion vulnerability in leandrocp mdex allows denial of service via deeply nested Markdown input. mdex converts between an Elixir %MDEx.Document struct and Comrak's internal AST using two mutually recursive Rust functions, exdocumenttocomrakast and comrakasttoexdocument, in the NI...

CVE-2026-53426

Summary: CVE-2026-53426 affects the MDEx JSON parser. An attacker-controlled node_type in JSON fed to MDEx.parse_document/2 causes repeated String.to_atom/1 calls via Module.concat/1, creating permanent atoms and eventually exhausting the BEAM atom table. Consequence is unauthenticated denial-of-...

EUVD-2026-40178

Improper Neutralization of Input During Web Page Generation XSS vulnerability in leandrocp mdex allows cross-site scripting via unsanitized URL schemes in Quill Delta output. 'Elixir.MDEx':todelta/2 converts Markdown into a Quill Delta. 'Elixir.MDEx.DeltaConverter':defaultconvertnode/3 in...

CVE-2026-54888

Uncontrolled Recursion vulnerability in leandrocp mdex allows denial of service via deeply nested Markdown input. mdex converts between an Elixir %MDEx.Document struct and Comrak's internal AST using two mutually recursive Rust functions, exdocumenttocomrakast and comrakasttoexdocument, in the NI...

CVE-2026-54888 Uncontrolled recursion over deeply nested Markdown crashes the BEAM in mdex

Uncontrolled Recursion vulnerability in leandrocp mdex allows denial of service via deeply nested Markdown input. mdex converts between an Elixir %MDEx.Document struct and Comrak's internal AST using two mutually recursive Rust functions, exdocumenttocomrakast and comrakasttoexdocument, in the NI...

EEF-CVE-2026-54888 Uncontrolled recursion over deeply nested Markdown crashes the BEAM in mdex

Summary Uncontrolled Recursion vulnerability in leandrocp mdex allows denial of service via deeply nested Markdown input. mdex converts between an Elixir %MDEx.Document struct and Comrak's internal AST using two mutually recursive Rust functions, ex\document\to\comrak\ast and...

CVE-2026-54888

The CVE-2026-54888 issue is a denial-of-service in mdex/mdex_native caused by uncontrolled recursion when converting Markdown to an AST across a NIF boundary. The root cause is missing maximum nesting depth in two mutual Rust functions (ex_document_to_comrak_ast and comrak_ast_to_ex_document), al...

CVE-2026-53428

Summary: The CVE describes an unbounded memory allocation in the mdex/native codepath when parsing a user-supplied highlight_lines range in Markdown code blocks, enabling a denial-of-service via memory exhaustion. The affected components are mdex (v0.11.0 before 0.12.3) and mdex_native (v0.1.0 be...

CVE-2026-53428 Unbounded memory allocation in highlight_lines range expansion in mdex

Memory Allocation with Excessive Size Value vulnerability in leandrocp mdex allows an unauthenticated attacker to cause a denial of service through unbounded memory allocation. comraknif::lumisadapter::LumisAdapter::parsehighlightlines in native/comraknif/src/lumisadapter.rs eagerly expands a...

CVE-2026-53427 Cross-site scripting in MDEx via unescaped highlight_lines_class code-fence attribute

Improper Neutralization of Input During Web Page Generation 'Cross-site Scripting' vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown. When syntax highlighting and full info-string forwarding render: fullinfostring: true are enabled, t...

PT-2026-53680

Improper Neutralization of Input During Web Page Generation 'Cross-site Scripting' vulnerability in leandrocp MDEx allows stored or reflected cross-site scripting via attacker-controlled Markdown. When syntax highlighting and full info-string forwarding render: full info string: true are enabled,...

PT-2026-53684

Name of the Vulnerable Software and Affected Versions leandrocp MDEx versions 0.4.3 through 0.13.1 Description An excessive allocation issue exists when the MDEx.parse document/2 function accepts a :json, json source. The private json to node/1 function passes an attacker-controlled node type val...

PT-2026-53687

Name of the Vulnerable Software and Affected Versions leandrocp mdex versions 0.8.3 through 0.13.1 Description Improper neutralization of input during web page generation allows cross-site scripting XSS via unsanitized URL schemes in Quill Delta output. The function to delta/2 converts Markdown...