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Regular Expression Denial of Service in markdown

Low severity GitHub Reviewed Published Sep 4, 2020 • Updated Mar 24, 2022

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

Severity

Low

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-wx77-rp39-c6vg
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