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Fencer Vulns
high 7.5

CVE-2026-41680 json

Marked: OOM Denial of Service via Infinite Recursion in marked Tokenizer

published 2026-04-24 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-25585 , GHSA-6v9c-7cg6-27q7

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm marked 18.0.2
  • marked_project marked 18.0.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41680 updated cvss 7.5

marked: Marked: Denial of Service via specific input sequence

  • Red Hat build of Apicurio Registry 2 marked
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Build of Podman Desktop rh-podman-desktop.git
    affected: workaround, no fix available
  • Red Hat Build of Podman Desktop - Tech Preview rhdesktop/rh-podman-desktop-ext-bootc-rhel10
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ceph Storage 9 rhceph/alloy-rhel10 Red Hat Enterprise Linux 10 grafana
    affected: workaround, no fix available
  • Red Hat Fuse 7 marked Red Hat JBoss Enterprise Application Platform 7 marked Red Hat OpenShift GitOps openshift-gitops-1/argocd-rhel8, openshift-gitops-1/argocd-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal
    affected: workaround, no fix available
  • Red Hat Ceph Storage 8.1 rhceph/grafana-rhel9 1791176238
    fixed: vendor fix RHSA-2026:79243
  • Red Hat Satellite 6.18 satellite/iop-advisor-frontend-rhel9 1781181673, satellite/iop-vulnerability-frontend-rhel9 1781032495
    fixed: vendor fix RHSA-2026:26214
show 6 more
  • Red Hat Migration Toolkit for Virtualization migration-toolkit-virtualization/mtv-console-plugin-rhel9 Red Hat Multicluster Engine for Kubernetes multicluster-engine/console-mce-rhel9
    not affected: component not present
  • Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-console-plugin-419-rhel9 Red Hat OpenShift Service Mesh 3 openshift-service-mesh/kiali-rhel9, openshift-service-mesh/kiali-ossmc-rhel9
    not affected: vulnerable code not present
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/console-rhel9
    not affected: component not present
  • Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8 Red Hat Ansible Automation Platform 2 automation-gateway, automation-platform-ui, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-tech-preview/mcp-server-rhel9 Red Hat build of Apicurio Registry 3 apicurio/apicurio-studio-ui-rhel8, apicurio/apicurio-registry-ui-rhel8, apicurio/apicurio-registry-ui-rhel9 Red Hat Ceph Storage 8.1 rhceph/rhceph-8-rhel9 1791176990, rhceph/keepalived-rhel9 1791175257, rhceph/oauth2-proxy-rhel9 1791176282, rhceph/snmp-notifier-rhel9 1791176336, rhceph/rhceph-haproxy-rhel9 1791176338, rhceph/rhceph-promtail-rhel9 1791176366 Red Hat Data Grid 8 marked Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9
    +1 more products
    Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 grafana, grafana-selinux
    not affected: component not present
  • Red Hat Enterprise Linux 10 cldr-emoji-annotation Red Hat Hardened Images ruff, yarnpkg Red Hat JBoss Enterprise Application Platform 8 marked Red Hat JBoss Enterprise Application Platform Expansion Pack marked Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9, rhoai/odh-mod-arch-maas-rhel9, rhoai/odh-mod-arch-gen-ai-rhel9, rhoai/odh-mod-arch-model-registry-rhel9 Red Hat OpenShift Container Platform 4 openshift4/ose-console-rhel9, openshift4/ose-monitoring-plugin-rhel9
    +2 more products
    Red Hat streams for Apache Kafka 2 marked Red Hat streams for Apache Kafka 3 marked
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/markedjs/marked/security/advisories/GHSA-6v9c-7cg6-27q7 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.7 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
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 8.7 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
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm marked
>=18.0.0, <18.0.2
18.0.2

Affected products

  • markedjs marked

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-674 Uncontrolled Recursion
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.