GitHub Advisoryadvisory · npm
GHSA-p9wx-2529-fp83 Marked allows Regular Expression Denial of Service (ReDoS) attacks
MEDIUM
Official page ↗
- Aliases
- CVE-2018-25110
- Ecosystem
- npm
- Packages
- marked
- Severity
- Moderate
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- Weaknesses
- CWE-1333
- Reviewed
- 2025-05-27
Affected packages
• npm marked: < 0.3.17 → fixed in 0.3.17
Description
Marked prior to version 0.3.17 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to catastrophic backtracking in several regular expressions used for parsing HTML tags and markdown links. An attacker can exploit this vulnerability by providing specially crafted markdown input, such as deeply nested or repetitively structured brackets or tag attributes, which cause the parser to hang and lead to a Denial of Service.
Related
Alias · CVE (1)
- CVE-2018-25110 Marked prior to version 0.3.17 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to catastrophic backtracking in… vulnerability
Weakness · CWE (1)
- CWE-1333 Inefficient Regular Expression Complexity weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-25110 advisory
- https://github.com/markedjs/marked/issues/1070 web
- https://github.com/markedjs/marked/pull/1083 web
- https://github.com/markedjs/marked/commit/20bfc106013ed45713a21672ad4a34df94dcd485 web
- https://github.com/Checkmarx/Vulnerabilities-Proofs-of-Concept/tree/main/2018/CVE-2018-25110 web
- https://github.com/markedjs/marked package