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CVE-2026-49492 shd101wyy CVE debrief

CVE-2026-49492 is a HIGH severity vulnerability in Markdown Preview Enhanced before version 0.8.28. The vulnerability allows for OS command injection when a crafted markdown document is previewed on Windows. This is due to the application opening external files and links from the preview through a shell without validating untrusted inputs taken from the markdown document.

Vendor
shd101wyy
Product
Markdown Preview Enhanced
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-06-05
Advisory published
2026-06-05
Advisory updated
2026-06-05

Who should care

Users of Markdown Preview Enhanced on Windows should update to version 0.8.28 or later to mitigate this vulnerability.

Technical summary

The vulnerability exists in the handling of the diagram filename attribute, imported file paths, and the latex_engine code-chunk attribute in markdown documents. An attacker can inject operating system commands that execute when the document is previewed.

Defensive priority

HIGH

Recommended defensive actions

  • Update Markdown Preview Enhanced to version 0.8.28 or later.
  • Be cautious when previewing markdown documents from untrusted sources.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd] respectively. Additional information is available at [ref-4] and [ref-5].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49492 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49492

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49492 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49492

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.