GHSA-x6m6-5hrf-fh6r
Denial of Service in markdown-it-toc-and-anchor
GHSA-x6m6-5hrf-fh6r is a high vulnerability (CVSS 7.5) in markdown-it-toc-and-anchor, published September 1, 2020. No source lists public exploit code. Fixed in markdown-it-toc-and-anchor 4.2.0.
- Severity
- 7.5 HighCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
4.2.0markdown-it-toc-and-anchor
Description
All versions of markdown-it-toc-and-anchor are vulnerable to Denial of Service. Parsing markdown containing **text**+\n@[toc] causes the application to enter and infinite loop.
Recommendation
No fix is currently available. Consider using an alternative module until a fix is made available.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Affected packages
| Package | Affected | Fixed |
|---|---|---|
markdown-it-toc-and-anchornpm | before 4.2.0 | 4.2.0 |
What each source reports
GitHub Advisories Score used
Denial of Service in markdown-it-toc-and-anchor
All versions of markdown-it-toc-and-anchor are vulnerable to Denial of Service. Parsing markdown containing **text**+\n@[toc] causes the application to enter and infinite loop.
Recommendation
No fix is currently available. Consider using an alternative module until a fix is made available.
- Record
GHSA-x6m6-5hrf-fh6r- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
Denial of Service in markdown-it-toc-and-anchor
All versions of markdown-it-toc-and-anchor are vulnerable to Denial of Service. Parsing markdown containing **text**+\n@[toc] causes the application to enter and infinite loop.
Recommendation
No fix is currently available. Consider using an alternative module until a fix is made available.
- Record
GHSA-x6m6-5hrf-fh6r- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - 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.