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CVE-2026-53427

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, the Lumis adapter copies the value of a code fence's highlight_lines_class info-string attribute, unescaped, into the class attribute of every rendered line. comrak_nif::lumis_adapter::LumisAdapt
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:76ab1bbbbeccfe57833a8c3df8133b072ee8929c768473478a9179aedd8767c9
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":["'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/lumis_adapter.rs"],"programRoutines":[{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::write_h…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/affected/3

{"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/lumis_adapter.rs"],"programRoutines":[{"name":"comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::write_highlighted"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://g…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /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/lumis_adapter.rs"],"programRoutines":[{"name":"comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::write_highlighted"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://github.com/leandrocp/md…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/affected/0

{"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/lumis_adapter.rs"],"programRoutines":[{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::write_highlighted"},{"name":"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/affected/2

Affected products and versions

4 source assertions
{"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/lumis_adapter.rs"],"programRoutines":[{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::write_h…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/affected/3
{"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/lumis_adapter.rs"],"programRoutines":[{"name":"comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::write_highlighted"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://g…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /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/lumis_adapter.rs"],"programRoutines":[{"name":"comrak_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"comrak_nif::lumis_adapter::LumisAdapter::write_highlighted"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://github.com/leandrocp/md…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/affected/0
{"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/lumis_adapter.rs"],"programRoutines":[{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::parse_custom_attributes"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::highlight_lines_config"},{"name":"mdex_native_nif::lumis_adapter::LumisAdapter::write_highlighted"},{"name":"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-53427.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/leandrocp/mdex_native/commit/798a363b4339f6f7162ec8437c4c9f9b5ae6fbf3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/leandrocp/mdex_native/security/advisories/GHSA-v664-pmxr-mxxx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-53427"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5e7d1aed1edc39a3f53d01007285a5ce7752af7d2aba38981989d900ed9bee60 · sha256:e46692adaf1ce030… · /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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