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CVE-2026-53428

Memory Allocation with Excessive Size Value vulnerability in leandrocp mdex allows an unauthenticated attacker to cause a denial of service through unbounded memory allocation. comrak_nif::lumis_adapter::LumisAdapter::parse_highlight_lines in native/comrak_nif/src/lumis_adapter.rs eagerly expands a user-controlled inclusive line range from a fenced code block's highlight_lines decorator into a Vec<usize>, pushing one element per integer in the range with no upper bound on the range size. An att
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d277d920b196328c7f36189ae80ca9a3453670ec85959c3212675ce839a921e8
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:*:*:*:*:*:*:*:*"],"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_highlight_lines"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"6ed94d905f97af188323f042698ae841c02293b4","status":"affected","version":"a8…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /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_highlight_lines"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"0.12.3","status":"affected","version":"0.11.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /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_highlight_lines"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://github.com/leandrocp/m…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/affected/2

{"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_highlight_lines"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/affected/3

Affected products and versions

4 source assertions
{"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_highlight_lines"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"6ed94d905f97af188323f042698ae841c02293b4","status":"affected","version":"a8…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /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_highlight_lines"},{"name":"'Elixir.MDEx':to_html/2"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"0.12.3","status":"affected","version":"0.11.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /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_highlight_lines"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://github.com/leandrocp/m…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/affected/2
{"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_highlight_lines"},{"name":"'Elixir.MDExNative.Native':document_to_html_with_options/2"},{"name":"'Elixir.MDExNative.Comrak':document_to_html/2"}],"repo":"https://…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-789","description":"CWE-789 Memory Allocation with Excessive Size Value","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-53428.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /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:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/leandrocp/mdex_native/security/advisories/GHSA-j93q-9cvj-rxfm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-53428"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f2f83917bb641b4ebc845cd33afaa447c7f6bb344c7b9b8b2faaf2e0a3e2acc0 · sha256:442ebf664604b498… · /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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