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    CVE-2026-41680

    Marked is a markdown parser and compiler. From 18.0.0 to 18.0.1, a critical Denial of Service (DoS) vulnerability exists in marked. By providing a specific 3-byte input sequence a tab, a vertical tab, and a newline (\x09\x0b\n)—an unauthenticated attacker can trigger an infinite recursion loop during parsing. This leads to unbounded memory allocation, causing the host Node.js application to crash via Memory Exhaustion (OOM). This vulnerability is fixed in 18.0.2.

    Published:Apr 24, 2026
    Last Modified:Apr 28, 2026
    EPS:Apr 24, 2026
    EPSS Score:0.00043
    CVSS Score:7.5

    Affected Products

    Vendor
    Marked Project
    Product
    Marked
    Vendor
    Markedjs
    Product
    Marked

    Exploits

    https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7

    Related CVEs

    CVE-2018-25110 (CVSS 6.9) — Marked prior to version 0.3.17 is vulnerable to a Regular Expression Denial of Service (ReDoS) attack due to c…
    CVE-2022-21680 (CVSS 7.5) — Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may caus…
    CVE-2022-21681 (CVSS 7.5) — Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `inline.reflinkSearc…
    CVE-2021-21306 (CVSS 5.3) — Marked is an open-source markdown parser and compiler (npm package "marked"). In marked from version 1.1.1 and…
    CVE-2014-3743 (CVSS 6.1) — Multiple cross-site scripting (XSS) vulnerabilities in the Marked module before 0.3.1 for Node.js allow remote…
    CVE-2017-16114 (CVSS 7.5) — The marked module is vulnerable to a regular expression denial of service. Based on the information published …
    CVE-2016-10531 (CVSS 6.1) — marked is an application that is meant to parse and compile markdown. Due to the way that marked 0.3.5 and ear…
    CVE-2017-1000427 (CVSS 6.1) — marked version 0.3.6 and earlier is vulnerable to an XSS attack in the data: URI parser.…
    CVE-2015-8854 (CVSS 7.5) — The marked package before 0.3.4 for Node.js allows attackers to cause a denial of service (CPU consumption) vi…
    CVE-2015-1370 (CVSS 4.3) — Incomplete blacklist vulnerability in marked 0.3.2 and earlier for Node.js allows remote attackers to conduct …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High