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Regular Expression Denial of Service in markdown

Low severity GitHub Reviewed Published Sep 4, 2020 to the GitHub Advisory Database • Updated Jan 9, 2023

Package

npm markdown (npm)

Affected versions

>= 0.0.0

Patched versions

None

Description

All versions of markdown are vulnerable to Regular Expression Denial of Service (ReDoS). The markdown.toHTML() function has significantly degraded performance when parsing long strings containing underscores. This may lead to Denial of Service if the parser accepts user input.

Recommendation

No fix is currently available. Consider using an alternative package until a fix is made available.

References

Reviewed Aug 31, 2020
Published to the GitHub Advisory Database Sep 4, 2020
Last updated Jan 9, 2023

Severity

Low

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-wx77-rp39-c6vg
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