EUVD-2026-25585
GHSA-6v9c-7cg6-27q7
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
9Blast Radius
ecosystem impact- 15 npm packages depend on marked (11 direct, 4 indirect)
Ecosystem-wide dependent count for version 18.0.0.
DescriptionNVD
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.
AnalysisAI
Unauthenticated remote attackers can crash Node.js applications using marked versions 18.0.0-18.0.1 by sending a specially crafted 3-byte sequence (tab, vertical tab, newline). The infinite recursion loop exhausts memory and triggers an out-of-memory crash, enabling complete denial of service against any exposed markdown parsing endpoint. …
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RemediationAI
Within 24 hours: inventory all Node.js applications and dependencies using marked library; identify instances running versions 18.0.0 or 18.0.1. Within 7 days: upgrade marked to version 18.0.2 or later across all development, staging, and production environments; test markdown parsing functionality post-upgrade. …
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External POC / Exploit Code
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