GHSA-wx77-rp39-c6vg
Regular Expression Denial of Service in markdown
GHSA-wx77-rp39-c6vg is a vulnerability with no CVSS score yet in markdown, published September 4, 2020. No source lists public exploit code. No source names a fixed version.
- Severity
- UnratedNo CVSS score yet
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
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.
Affected packages
| Package | Affected | Fixed |
|---|---|---|
markdownnpm | 0.0.0 and later | None known |
What each source reports
GitHub AdvisoriesNo score
Regular Expression Denial of Service in markdown
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.
- Record
GHSA-wx77-rp39-c6vg- Weakness
- CWE-400
- Updated
- 2026-11-02
OSVNo score
Regular Expression Denial of Service in markdown
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.
- Record
GHSA-wx77-rp39-c6vg- Weakness
- CWE-400
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.