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CVE-2026-53429

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 a document that contains escaped-tag nodes. The conversion of each %MDEx.EscapedTag{} node into its native representation (From<ExEscapedTag> for NodeValue in the Rust NIF) calls Box::leak on the caller-suppli
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cf3b1634779665e4e3be9ea393ed2dd2f8cc8b9b368d694f9c2edd9cc767a42f
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://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDExNative.Comrak'","mdex_native_nif"],"packageName":"mdex_native","packageURL":"pkg:hex/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs"],"programRoutines":[{"name":"mdex_native_nif::document_to_html_with_options"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://github.com/leandrocp/mdex_native","vendor"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/2

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","comrak_nif"],"packageName":"leandrocp/mdex","packageURL":"pkg:github/leandrocp/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs"],"programRoutines":[{"name":"comrak_nif::document_to_html_with_options"},{"name":"'Elixir.MDEx.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDEx':to_html/1"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"6ed94d905f97af188323f042698ae84…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/1

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","comrak_nif"],"packageName":"mdex","packageURL":"pkg:hex/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs"],"programRoutines":[{"name":"comrak_nif::document_to_html_with_options"},{"name":"'Elixir.MDEx.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDEx':to_html/1"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"0.12.3","status":"affected","version":"0.11.0","versi…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/0

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

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/3

Affected products and versions

4 source assertions
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDExNative.Comrak'","mdex_native_nif"],"packageName":"mdex_native","packageURL":"pkg:hex/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs"],"programRoutines":[{"name":"mdex_native_nif::document_to_html_with_options"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://github.com/leandrocp/mdex_native","vendor"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/2
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","comrak_nif"],"packageName":"leandrocp/mdex","packageURL":"pkg:github/leandrocp/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs"],"programRoutines":[{"name":"comrak_nif::document_to_html_with_options"},{"name":"'Elixir.MDEx.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDEx':to_html/1"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"6ed94d905f97af188323f042698ae84…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","comrak_nif"],"packageName":"mdex","packageURL":"pkg:hex/mdex","product":"mdex","programFiles":["native/comrak_nif/src/types/document.rs"],"programRoutines":[{"name":"comrak_nif::document_to_html_with_options"},{"name":"'Elixir.MDEx.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDEx':to_html/1"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"0.12.3","status":"affected","version":"0.11.0","versi…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex_native:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDExNative.Comrak'","mdex_native_nif"],"packageName":"leandrocp/mdex_native","packageURL":"pkg:github/leandrocp/mdex_native","product":"mdex_native","programFiles":["native/mdex_native_nif/src/types/document.rs"],"programRoutines":[{"name":"mdex_native_nif::document_to_html_with_options"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://github.com/leandrocp…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-401","description":"CWE-401 Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-53429.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/leandrocp/mdex_native/commit/cbd927fb5061b488de8d90a8ef6df65718ca1fe6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/leandrocp/mdex_native/security/advisories/GHSA-cmvp-gp9f-23xw"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/adp/0/references/0
{"tags":["vendor-advisory","related"],"url":"https://github.com/leandrocp/mdex_native/security/advisories/GHSA-cmvp-gp9f-23xw"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-53429"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:725dec637e1141cf6031c881fff349ce9ac3c49483d067aafe9d14722f1beb64 · sha256:fe1cfbcfa8e27115… · /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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