Skip to content
Fencer Vulns
high 7.5

CVE-2026-93749 json

source-map-js through 1.2.1 Event Loop Denial of Service

published 2026-09-18 51 d ago modified 2026-10-05 34 d ago also GHSA-68fv-2mgg-jv7q , EUVD-2026-83254

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.

Patch / fix

  • npm source-map-js 1.2.2
  • node-postcss Debian 14 8.5.31+~cs10.2.26-1

debian advisories DEBIAN-CVE-2026-93749

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-2026-93749 updated cvss 7.5

source-map-js: source-map-js: Denial of Service via malformed indexed source maps

  • Red Hat Node HealthCheck Operator workload-availability/node-remediation-console-rhel8, redhat-user-workloads/rhwa-tenant/node-healthcheck-operator/nhc-bundle-0-9, redhat-user-workloads/rhwa-tenant/node-healthcheck-operator/nhc-operator-0-9, redhat-user-workloads/rhwa-tenant/node-healthcheck-operator/nhc-must-gather-0-9 Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-agentic-console-rhel9, openshift-lightspeed/lightspeed-console-plugin-419-rhel9, openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9, openshift-pipelines/pipelines-console-plugin-rhel9, openshift-pipelines/pipelines-console-plugin-pf5-rhel9 Red Hat AMQ Broker 7 amq-broker-maven-repository.zip 7.14.1.CR3
    affected: no fix available
  • Red Hat Ansible Automation Platform 2 automation-controller 4.5.36-1.el9ap, ansible-automation-platform-27/gateway-rhel9, ansible-automation-platform/automation-dashboard-rhel9, automation-eda-controller 1.0.10-0.1.20260317.git9cae940.el8ap
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat build of Apache Camel - HawtIO 4 rhaf-hawtio-maven-repository.zip 4.4.0.GA Red Hat build of Apicurio Registry 3 apicurio/apicurio-registry-ui-rhel8 Red Hat Build of Keycloak rhbk-quarkus-dist.zip 26.6.7.CR1, keycloak-operator.redhat-00001.zip 26.6.6, keycloak-operator.redhat-00003.zip 26.6.7
    affected: no fix available
  • Red Hat Ceph Storage 9 rhceph-ci/alloy, rhceph/alloy-rhel10
    affected: no fix available “Fix deferred”
  • Red Hat Certification Program for Red Hat Enterprise Linux 9 redhat-certification-cnf 9.0-20240522.1.el9
    affected: no fix available
  • Red Hat Data Grid 8 redhat-datagrid-maven-repository.zip 8.6.1.CR1
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 10 cockpit-image-builder 94.3-1.el10_2
    affected: no fix available
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9 Red Hat Hardened Images grafana13.2 13.2.1-0.5.hum1, prometheus3.5 3.5.5-0.8.hum1
    affected: no fix available, no fix planned “Will not fix”
show 21 more
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-mlflow-rhel9 Red Hat OpenShift Container Platform 4 openshift4/ose-console-rhel9, openshift4/ose-agent-installer-ui-rhel9 Red Hat OpenShift Container Platform 5 openshift5/ose-console-rhel9 Red Hat Openshift Data Foundation 4 odf4/odf-console-rhel9, odf4/ocs-client-console-rhel9, rhceph-dev/odf4-odf-console-rhel9, odf4/odf-multicluster-console-rhel9, rhceph-dev/odf4-ocs-client-console-rhel9, rhceph-dev/odf4-odf-multicluster-console-rhel9 Red Hat OpenShift Dev Spaces devspaces/openvsx-rhel9, devspaces/dashboard-rhel9
    affected: no fix available
  • Red Hat OpenShift GitOps microshift-gitops 1.19.2-36.el9, openshift-gitops-argocd-cli 1.19.2-36.el9
    affected: no fix planned “Will not fix”
  • Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9
    affected: no fix available
  • Red Hat Satellite 6 satellite/iop-advisor-frontend-rhel9, satellite/iop-vulnerability-frontend-rhel9, satellite/iop-host-inventory-frontend-rhel9
    affected: no fix available, no fix planned “Will not fix”
  • Red Hat Secrets Management Console for Red Hat OpenShift external-secrets-management/console-plugin-rhel9
    affected: no fix planned “Will not fix”
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/automation-portal 1792523640
    fixed: vendor fix RHSA-2026:86675
  • Red Hat Cost Management On-Premise 1 costmanagement/costmanagement-ui-rhel10 1791460851
    fixed: vendor fix RHSA-2026:79357
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1792593817
    fixed: vendor fix RHSA-2026:88198
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1792603924, discovery/discovery-ui-rhel9 1793218530
    fixed: vendor fix RHSA-2026:92136
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1791853281
    fixed: vendor fix RHSA-2026:85846
  • Red Hat OpenShift AI 2.25 rhoai/odh-feature-server-rhel9 1792148523, rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1791288400
    fixed: vendor fix RHSA-2026:87410
  • Red Hat OpenShift AI 3.4 rhoai/odh-dashboard-rhel9 1793001801, rhoai/odh-mod-arch-maas-rhel9 1793001859, rhoai/odh-feature-server-rhel9 1791863220, rhoai/odh-mod-arch-automl-rhel9 1793001841, rhoai/odh-mod-arch-autorag-rhel9 1793001850, rhoai/odh-mod-arch-eval-hub-rhel9 1793001842, +1 more
    fixed: vendor fix RHSA-2026:92510
  • Red Hat OpenShift AI 3.5 rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 1791825469
    fixed: vendor fix RHSA-2026:86891
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/code-rhel9 1792599388
    fixed: vendor fix RHSA-2026:90321
  • Red Hat Trusted Artifact Signer 1.4 rhtas/rekor-search-ui-rhel9 1791534339
    fixed: vendor fix RHSA-2026:83598
  • Red Hat Gatekeeper 3 redhat-user-workloads/gatekeeper-tenant/gatekeeper-operator-3-19/gatekeeper-3-19
    not affected: component not present
  • Red Hat Multicluster Engine for Kubernetes multicluster-engine/console-mce-rhel9
    not affected: vulnerable code not in execute path
  • Red Hat OpenShift Service Mesh 3 openshift-service-mesh/kiali-rhel9-operator, openshift-service-mesh/kiali-operator-bundle, redhat-user-workloads/service-mesh-tenant/kiali-3-0-bundle, redhat-user-workloads/service-mesh-tenant/kiali-3-0-operator
    not affected: component not present
  • Red Hat 3scale API Management Platform 2 3scale-amp2/system-rhel8 Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/console-rhel9, redhat-user-workloads/crt-redhat-acm-tenant/console-acm-213, redhat-user-workloads/crt-redhat-acm-tenant/release-acm-211/console-acm-211
    not affected: vulnerable code not in execute path
  • Red Hat AMQ Broker 7 amq-broker-bin.zip 7.14.1.CR3
    not affected: vulnerable code not present
  • Red Hat Ansible Automation Platform 2 automation-platform-ui 2.6.14-1.el9ap, automation-gateway 2.5.20260923-1.el9ap, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8, ansible-automation-platform-26/lightspeed-rhel9
    not affected: vulnerable code not in execute path

22 more not affected in the full advisory

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
none
Automatable
yes
Technical impact
partial
Assessed
48 d ago

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

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
CNA 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
GitHub 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 source-map-js
>=1.0.0, <1.2.2
1.2.2

Affected products

  • 7rulnik source-map-js

Classification

Weakness
  • CWE-1284 Improper Validation of Specified Quantity in Input

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.