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CVE-2026-11422

Markdown Preview Enhanced 0.8.x with crossnote engine 0.9.28 contains a code injection vulnerability in the WaveDrom rendering pipeline that allows attackers to execute arbitrary JavaScript by embedding malicious content in a wavedrom fenced code block within a crafted Markdown document. Attackers can exploit the unsanitized passing of wavedrom block content to window.eval() in the VS Code webview context to abuse the extension's message passing and invoke arbitrary file writes on the local file
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:97517e98a1a03fcad4851c55558ba9c04135be0396eab32692bae2d84ea8f739
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced","defaultStatus":"affected","product":"Markdown Preview Enhanced","vendor":"shd101wyy","versions":[{"lessThan":"0.8.27","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/affected/0

{"collectionURL":"https://github.com/shd101wyy/crossnote","defaultStatus":"affected","product":"crossnote","vendor":"shd101wyy","versions":[{"lessThan":"0.9.28","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/affected/1
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/metrics/0/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.4,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/metrics/1/cvssV4_0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced","defaultStatus":"affected","product":"Markdown Preview Enhanced","vendor":"shd101wyy","versions":[{"lessThan":"0.8.27","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/affected/0
{"collectionURL":"https://github.com/shd101wyy/crossnote","defaultStatus":"affected","product":"crossnote","vendor":"shd101wyy","versions":[{"lessThan":"0.9.28","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/metrics/0/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":8.4,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/metrics/1/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-95","description":"CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["patch"],"url":"https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/references/2
{"tags":["issue-tracking"],"url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/adp/0/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/markdown-preview-enhanced-x-code-injection-via-wavedrom-rendering"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:df43c366ba24287762e5644ba432e2a228201768e96333820fd732916c907882 · sha256:c62d7df7090dbd26… · /containers/cna/references/3

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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