Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-54889

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':to_delta/2 converts Markdown into a Quill Delta. 'Elixir.MDEx.DeltaConverter':default_convert_node/3 in lib/mdex/delta_converter.ex copies the URL of a link, wikilink, or image node directly from the parsed Markdown into the Delta "link" or "image" attribute without applying a scheme allowlist or any normal
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:41f4ed2486baaba13a83ab1c70e53c01fd79c7453a36c5021306c1f13bcb8358
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","'Elixir.MDEx.DeltaConverter'"],"packageName":"leandrocp/mdex","packageURL":"pkg:github/leandrocp/mdex","product":"mdex","programFiles":["lib/mdex.ex","lib/mdex/delta_converter.ex"],"programRoutines":[{"name":"'Elixir.MDEx':to_delta/2"},{"name":"'Elixir.MDEx.DeltaConverter':convert/2"},{"name":"'Elixir.MDEx.DeltaConverter':default_convert_node/3"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"2817147f5b87ce…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/affected/1

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","'Elixir.MDEx.DeltaConverter'"],"packageName":"mdex","packageURL":"pkg:hex/mdex","product":"mdex","programFiles":["lib/mdex.ex","lib/mdex/delta_converter.ex"],"programRoutines":[{"name":"'Elixir.MDEx':to_delta/2"},{"name":"'Elixir.MDEx.DeltaConverter':convert/2"},{"name":"'Elixir.MDEx.DeltaConverter':default_convert_node/3"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"0.13.2","status":"affected","version…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","'Elixir.MDEx.DeltaConverter'"],"packageName":"leandrocp/mdex","packageURL":"pkg:github/leandrocp/mdex","product":"mdex","programFiles":["lib/mdex.ex","lib/mdex/delta_converter.ex"],"programRoutines":[{"name":"'Elixir.MDEx':to_delta/2"},{"name":"'Elixir.MDEx.DeltaConverter':convert/2"},{"name":"'Elixir.MDEx.DeltaConverter':default_convert_node/3"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"2817147f5b87ce…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:leandrocp:mdex:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.MDEx'","'Elixir.MDEx.DeltaConverter'"],"packageName":"mdex","packageURL":"pkg:hex/mdex","product":"mdex","programFiles":["lib/mdex.ex","lib/mdex/delta_converter.ex"],"programRoutines":[{"name":"'Elixir.MDEx':to_delta/2"},{"name":"'Elixir.MDEx.DeltaConverter':convert/2"},{"name":"'Elixir.MDEx.DeltaConverter':default_convert_node/3"}],"repo":"https://github.com/leandrocp/mdex","vendor":"leandrocp","versions":[{"lessThan":"0.13.2","status":"affected","version…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /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:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-54889.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/leandrocp/mdex/commit/2817147f5b87ce7186aa604c9ee72499485b8f2f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/leandrocp/mdex/security/advisories/GHSA-4383-7xfp-gpph"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/leandrocp/mdex/security/advisories/GHSA-4383-7xfp-gpph"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /containers/adp/0/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-54889"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2affb336fa389758cc120297655259a05ee9f1a3c2bacb3ebecd130c6bd4f132 · sha256:9fc676c1d685deaa… · /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.

← Back to CVE Explorer