source-map-js through 1.2.1 Event Loop Denial of Service
Priority MEDIUM 44CWE-1284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 10 fixed, 24 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00455 39th percentileScored 2026-11-07
Fix Partial source-map-js (npm): 1.2.2Red Hat: 12 advisoriesRed Hat: 10 fixed, 24 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| 7rulnik | source-map-js | up to 1.2.1 | — | No fix listed | CNA |
| — | source-map-js (npm) | 1.0.0 to before 1.2.2 | 1.2.2 | Patch available | GHSA-68fv-2mgg-jv7q |
- source-map-js Vendor7rulnik Affected up to 1.2.1 Fixed in — No fix listed CNA
- source-map-js (npm) Vendor— Affected 1.0.0 to before 1.2.2 Fixed in 1.2.2 Patch available GHSA-68fv-2mgg-jv7q
Remediation
- Fix · GHSA-68fv-2mgg-jv7q source-map-js (npm) Fixed in 1.2.2 Advisory →
Red Hat 12 advisories
- RHSA-2026:92510 Released 2026-10-29 · Red Hat rating CriticalRHOAI 3.4.6 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-cli-rhel9, registry.redhat.io/rhoai/odh-dashboard-rhel9 +47
- RHSA-2026:92136 Released 2026-10-28 · Red Hat rating ImportantA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
- RHSA-2026:91967 Released 2026-10-28 · Red Hat rating ImportantA Subscription Management tool for finding and reporting Red Hat product usage
- Red Hat Discovery 2 registry.redhat.io/discovery/discovery-server-rhel9, registry.redhat.io/discovery/discovery-ui-rhel9
Show 9 more Red Hat advisories
- RHSA-2026:90321 Released 2026-10-26 · Red Hat rating CriticalRed Hat OpenShift Dev Spaces 3.31.0 Release.
- Red Hat OpenShift Dev Spaces 3.31 registry.redhat.io/devspaces/code-rhel9, registry.redhat.io/devspaces/dashboard-rhel9, registry.redhat.io/devspaces/jetbrains-ide-rhel9 +8
- RHSA-2026:88198 Released 2026-10-22 · Red Hat rating ImportantRed Hat Developer Hub 1.10.6 release.
- Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9
- RHSA-2026:87410 Released 2026-10-21 · Red Hat rating CriticalRHOAI 2.25.12 - Red Hat OpenShift AI
- Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-caikit-nlp-rhel9, registry.redhat.io/rhoai/odh-codeflare-operator-rhel9 +47
- RHSA-2026:86891 Released 2026-10-21 · Red Hat rating CriticalRHOAI 3.5.2 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.5 registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-built-in-detector-rhel9, registry.redhat.io/rhoai/odh-cli-rhel9 +47
- RHSA-2026:86675 Released 2026-10-21 · Red Hat rating ImportantAnsible plug-ins for Red Hat Developer Hub Product Release Update
- Red Hat Ansible Automation Platform 2.2 registry.redhat.io/ansible-automation-platform/automation-portal
- RHSA-2026:85846 Released 2026-10-20 · Red Hat rating ImportantMigration Toolkit for Containers (MTC) 1.8.18 security and bug fix update
- Red Hat Migration Toolkit 1.8 registry.redhat.io/rhmtc/openshift-migration-controller-rhel8, registry.redhat.io/rhmtc/openshift-migration-registry-rhel8, registry.redhat.io/rhmtc/openshift-migration-ui-rhel8 +1
- RHSA-2026:84734 Released 2026-10-19 · Red Hat rating CriticalRHOAI 3.4.5 - Red Hat OpenShift AI
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhoai/odh-ai-gateway-payload-processing-rhel9, registry.redhat.io/rhoai/odh-automl-rhel9, registry.redhat.io/rhoai/odh-autorag-rhel9 +47
- RHSA-2026:83598 Released 2026-10-15 · Red Hat rating ImportantRHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
- Red Hat Trusted Artifact Signer 1.4 registry.redhat.io/rhtas/certificate-transparency-rhel9, registry.redhat.io/rhtas/fulcio-rhel9, registry.redhat.io/rhtas/rekor-backfill-redis-rhel9 +6
- RHSA-2026:79357 Released 2026-10-08 · Red Hat rating ImportantRed Hat Cost Management On-Premise container image update
- Red Hat Cost Management On-Premise 1 registry.redhat.io/costmanagement/costmanagement-ui-rhel10
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Node HealthCheck Operator | Affected | No fix yet |
| OpenShift Lightspeed | Affected | No fix yet |
| OpenShift Pipelines | Affected | No fix yet |
| Red Hat AMQ Broker 7 | Affected | No fix yet |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet |
| Red Hat Build of Keycloak | Affected | No fix yet |
| Red Hat Ceph Storage 9 | Affected | No fix yet: Fix deferred |
| Red Hat Certification Program for Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat Data Grid 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet |
| Red Hat Hardened Images | Affected | No fix yet |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet |
| Red Hat OpenShift GitOps | Affected | No fix planned: Will not fix |
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet |
| Red Hat Quay 3 | Affected | No fix yet |
| Red Hat Satellite 6 | Affected | No fix yet |
| Red Hat build of Apache Camel - HawtIO 4 | Affected | No fix yet |
| Red Hat build of Apicurio Registry 3 | Affected | No fix yet |
| Secrets Management Console for Red Hat OpenShift | Affected | No fix planned: Will not fix |
| Red Hat Ansible Automation Platform 2.2 | Fixed | RHSA-2026:86675 |
| Red Hat Cost Management On-Premise 1 | Fixed | RHSA-2026:79357 |
| Red Hat Developer Hub 1.10 | Fixed | RHSA-2026:88198 |
| Red Hat Discovery 2 | Fixed | RHSA-2026:91967, RHSA-2026:92136 |
| Red Hat Migration Toolkit 1.8 | Fixed | RHSA-2026:85846 |
| Red Hat OpenShift AI 2.25 | Fixed | RHSA-2026:87410 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:84734, RHSA-2026:92510 |
| Red Hat OpenShift AI 3.5 | Fixed | RHSA-2026:86891 |
| Red Hat OpenShift Dev Spaces 3.31 | Fixed | RHSA-2026:90321 |
| Red Hat Trusted Artifact Signer 1.4 | Fixed | RHSA-2026:83598 |
Not affected: 29 products
- Gatekeeper 3
- Multicluster Engine for Kubernetes
- OpenShift Service Mesh 3
- Red Hat 3scale API Management Platform 2
- Red Hat AMQ Broker 7
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Ansible Automation Platform 2
- Red Hat Developer Hub 1.10
- Red Hat Discovery 2
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Fuse 7
- Red Hat Hardened Images
- Red Hat JBoss Enterprise Application Platform 8
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat Migration Toolkit 1.8
- Red Hat OpenShift AI 2.25
- Red Hat OpenShift AI 3.4
- Red Hat OpenShift AI 3.5
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
- Red Hat OpenShift Dev Spaces 3.31
- Red Hat Quay 3
- Red Hat Satellite 6
- Red Hat Trusted Artifact Signer
- Red Hat Trusted Artifact Signer 1.4
- Red Hat build of Apache Camel for Spring Boot 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-93749
- 2026-10-03 Alias added: GHSA-68fv-2mgg-jv7q
- 2026-10-06 Fix available: npm/[email protected] · GHSA-68fv-2mgg-jv7q
- 2026-10-06 CVSS score added · GHSA-68fv-2mgg-jv7q
- 2026-10-06 Weakness changed · GHSA-68fv-2mgg-jv7q
- 2026-10-06 7 new references · GHSA-68fv-2mgg-jv7q
- 2026-10-06 Affected versions changed · Red Hat
- 2026-10-07 Affected versions changed · Red Hat
- 2026-10-07 Affected versions changed · Red Hat
- 2026-10-08 Affected versions changed · Red Hat
- 2026-10-09 Fix available: RHSA-2026:79357 · Red Hat
- 2026-10-09 Fix available: Red Hat Cost Management On-Premise 1 · Red Hat
- 2026-10-16 Fix available: RHSA-2026:83598 · Red Hat
- 2026-10-16 Fix available: Red Hat Trusted Artifact Signer 1.4 · Red Hat
- 2026-10-20 Fix available: RHSA-2026:85846 · Red Hat
- 2026-10-20 Fix available: RHSA-2026:84734 · Red Hat
- 2026-10-20 Fix available: Red Hat Migration Toolkit 1.8, Red Hat OpenShift AI 3.4 · Red Hat
- 2026-10-21 Fix available: RHSA-2026:86675 · Red Hat
- 2026-10-21 Fix available: Red Hat Ansible Automation Platform 2.2 · Red Hat
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-22 Fix available: RHSA-2026:86891 · Red Hat
- 2026-10-22 Fix available: RHSA-2026:87410 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:88198 · Red Hat
- 2026-10-23 Fix available: Red Hat Developer Hub 1.10, Red Hat OpenShift AI 2.25, Red Hat OpenShift AI 3.5 · Red Hat
- 2026-10-29 Fix available: Red Hat OpenShift Dev Spaces 3.31 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:90321 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:91967 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:92136 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:92510 · Red Hat
- 2026-10-30 Fix available: Red Hat Discovery 2 · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
- 2026-10-31 Affected versions changed · Red Hat
References
Other 6
- GitHub Issue #76
- https://github.com/7rulnik/source-map-js
- line-padding loop driven by the unvalidated section offset line
- https://github.com/7rulnik/source-map-js/pull/79
- https://github.com/7rulnik/source-map-js/commit/cf7658058ceeaa8619d5ae0ec90be6905209d016
- https://github.com/7rulnik/source-map-js/releases/tag/v1.2.2
Sources
- CVE-2026-93749 · CVE Program
- CVE-2026-93749 · NVD
- FIRST EPSS
- GHSA-68fv-2mgg-jv7q · GitHub Advisory Database · CC BY 4.0
- CVE-2026-93749 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences