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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, ex_document_to_comrak_ast and comrak_ast_to_ex_document, in the NIF source file document.rs. Neither function enforces a maximum nesting depth, so the recursion depth is bounded only by the structure of the input. An attacker who can get a Markdown document
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b009cfbe38b586f487e313727a1b848d78ac9b387a1b7ef2e736310541d3a6a5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["mdex_native_nif","'Elixir.MDExNative.Native'"],"packageName":"leandrocp/mdex_native","packageURL":"pkg:github/leandrocp/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs","lib/mdex_native/native.ex"],"programRoutines":[{"name":"mdex_native_nif::types::document::ex_document_to_comrak_ast"},{"name":"mdex_native_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDExNative.Native':parse_document/2…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/3

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["mdex_native_nif","'Elixir.MDExNative.Native'"],"packageName":"mdex_native","packageURL":"pkg:hex/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs","lib/mdex_native/native.ex"],"programRoutines":[{"name":"mdex_native_nif::types::document::ex_document_to_comrak_ast"},{"name":"mdex_native_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDExNative.Native':parse_document/2"},{"name":"'Elixir.MD…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/2

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["comrak_nif","'Elixir.MDEx'","'Elixir.MDEx.Native'"],"packageName":"mdex","packageURL":"pkg:hex/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs","lib/mdex.ex","lib/mdex/native.ex"],"programRoutines":[{"name":"comrak_nif::types::document::ex_document_to_comrak_ast"},{"name":"comrak_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDEx':parse_document!/1"},{"name":"'Elixir.MDEx':to_html/1"},{"name":"'Elixir.MDEx.Nativ…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["comrak_nif","'Elixir.MDEx'","'Elixir.MDEx.Native'"],"packageName":"leandrocp/mdex","packageURL":"pkg:github/leandrocp/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs","lib/mdex.ex","lib/mdex/native.ex"],"programRoutines":[{"name":"comrak_nif::types::document::ex_document_to_comrak_ast"},{"name":"comrak_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDEx':parse_document!/1"},{"name":"'Elixir.MDEx':to_html/1"},{"nam…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/1

Affected products and versions

4 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["mdex_native_nif","'Elixir.MDExNative.Native'"],"packageName":"leandrocp/mdex_native","packageURL":"pkg:github/leandrocp/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs","lib/mdex_native/native.ex"],"programRoutines":[{"name":"mdex_native_nif::types::document::ex_document_to_comrak_ast"},{"name":"mdex_native_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDExNative.Native':parse_document/2…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/3
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["mdex_native_nif","'Elixir.MDExNative.Native'"],"packageName":"mdex_native","packageURL":"pkg:hex/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs","lib/mdex_native/native.ex"],"programRoutines":[{"name":"mdex_native_nif::types::document::ex_document_to_comrak_ast"},{"name":"mdex_native_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDExNative.Native':parse_document/2"},{"name":"'Elixir.MD…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/2
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["comrak_nif","'Elixir.MDEx'","'Elixir.MDEx.Native'"],"packageName":"mdex","packageURL":"pkg:hex/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs","lib/mdex.ex","lib/mdex/native.ex"],"programRoutines":[{"name":"comrak_nif::types::document::ex_document_to_comrak_ast"},{"name":"comrak_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDEx':parse_document!/1"},{"name":"'Elixir.MDEx':to_html/1"},{"name":"'Elixir.MDEx.Nativ…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["comrak_nif","'Elixir.MDEx'","'Elixir.MDEx.Native'"],"packageName":"leandrocp/mdex","packageURL":"pkg:github/leandrocp/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs","lib/mdex.ex","lib/mdex/native.ex"],"programRoutines":[{"name":"comrak_nif::types::document::ex_document_to_comrak_ast"},{"name":"comrak_nif::types::document::comrak_ast_to_ex_document"},{"name":"'Elixir.MDEx':parse_document!/1"},{"name":"'Elixir.MDEx':to_html/1"},{"nam…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-674","description":"CWE-674 Uncontrolled Recursion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-54888.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/leandrocp/mdex_native/commit/947696c47bc22bea5dffc0f78c946fa6b70ce183"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/leandrocp/mdex_native/security/advisories/GHSA-3w4f-53g2-f66p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/adp/0/references/0
{"tags":["vendor-advisory","related"],"url":"https://github.com/leandrocp/mdex_native/security/advisories/GHSA-3w4f-53g2-f66p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-54888"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e3fa5f1289462e0831f8cdac7a08b71b6a7247cba664cc37d7179614adc4988d · sha256:ec12ac37ac05346a… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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