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TI-2025-40848 Aliases CVE-2025-66412GHSA-v4hv-rgfq-gp49

Angular Stored XSS Vulnerability via SVG Animation, SVG URL and MathML Attributes

Priority LOW 37CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 2 fixed, 12 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.

Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 21.0.2, 20.3.15, and 19.2.17, A Stored Cross-Site Scripting (XSS) vulnerability has been identified in the Angular Template Compiler. It occurs because the compiler's internal security schema is incomplete, allowing attackers to bypass Angular's built-in security sanitization. Specifically, the schema fails to classify certain URL-holding attributes (e.g., those that could contain javascript: URLs) as requiring strict URL security, enabling the injection of malicious scripts. This vulnerability is fixed in 21.0.2, 20.3.15, and 19.2.17.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00383 32nd percentileScored 2026-11-07
Fix Partial @angular/compiler (npm): 21.0.2, 20.3.15, 19.2.17Red Hat: 2 advisoriesRed Hat: 2 fixed, 12 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
angularangular>= 21.0.0-next.0 < 21.0.2; >= 20.0.0-next.0 < 20.3.15; >= 19.0.0-next.0 < 19.2.17; up to 18.2.14—No fix listedCNA
—@angular/compiler (npm)21.0.0-next.0 to before 21.0.221.0.2Patch availableGHSA-v4hv-rgfq-gp49
—@angular/compiler (npm)20.0.0-next.0 to before 20.3.1520.3.15Patch availableGHSA-v4hv-rgfq-gp49
—@angular/compiler (npm)19.0.0-next.0 to before 19.2.1719.2.17Patch availableGHSA-v4hv-rgfq-gp49
—@angular/compiler (npm)up to 18.2.14—No fix listedGHSA-v4hv-rgfq-gp49
  • angular Vendorangular Affected >= 21.0.0-next.0 < 21.0.2; >= 20.0.0-next.0 < 20.3.15; >= 19.0.0-next.0 < 19.2.17; up to 18.2.14 Fixed in — No fix listed CNA
  • @angular/compiler (npm) Vendor— Affected 21.0.0-next.0 to before 21.0.2 Fixed in 21.0.2 Patch available GHSA-v4hv-rgfq-gp49
  • @angular/compiler (npm) Vendor— Affected 20.0.0-next.0 to before 20.3.15 Fixed in 20.3.15 Patch available GHSA-v4hv-rgfq-gp49
  • @angular/compiler (npm) Vendor— Affected 19.0.0-next.0 to before 19.2.17 Fixed in 19.2.17 Patch available GHSA-v4hv-rgfq-gp49
  • @angular/compiler (npm) Vendor— Affected up to 18.2.14 Fixed in — No fix listed GHSA-v4hv-rgfq-gp49

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*up to 18.2.14; 19.0.0 to before 19.2.17; 20.0.0 to before 20.3.15; 21.0.0 to before 21.0.2Vulnerableangular
  • cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* Versions up to 18.2.14; 19.0.0 to before 19.2.17; 20.0.0 to before 20.3.15; 21.0.0 to before 21.0.2 Vulnerable ·angular

Remediation

  • Fix · GHSA-v4hv-rgfq-gp49 @angular/compiler (npm) Fixed in 21.0.2 Advisory →
  • Fix · GHSA-v4hv-rgfq-gp49 @angular/compiler (npm) Fixed in 20.3.15 Advisory →
  • Fix · GHSA-v4hv-rgfq-gp49 @angular/compiler (npm) Fixed in 19.2.17 Advisory →

Red Hat 2 advisories

  • RHSA-2026:86618 Released 2026-10-21 · Red Hat rating Critical
    New container image: rhceph-9.2
    • Red Hat Ceph Storage 9.2 registry.redhat.io/rhceph/rhceph-9-rhel10
  • RHSA-2026:33371 Released 2026-06-30 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 7.3.18 security update
    • Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 Server eap7-apache-cxf-3.4.10-4.SP2_redhat_00004.1.el7eap, eap7-apache-cxf-rt-3.4.10-4.SP2_redhat_00004.1.el7eap, eap7-apache-cxf-services-3.4.10-4.SP2_redhat_00004.1.el7eap +7

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Logging Subsystem for Red Hat OpenShiftAffectedNo fix planned: Will not fix
Red Hat Ceph Storage 5AffectedNo fix yet
Red Hat Ceph Storage 6AffectedNo fix yet
Red Hat Ceph Storage 7AffectedNo fix yet
Red Hat Ceph Storage 8AffectedNo fix yet
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Fuse 7AffectedNo fix yet
Red Hat Quay 3AffectedNo fix yet
Red Hat Single Sign-On 7AffectedNo fix planned: Will not fix
Red Hat Ceph Storage 9.2Fixed RHSA-2026:86618
Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 ServerFixed RHSA-2026:33371
Not affected: 11 products
  • Red Hat Advanced Cluster Management for Kubernetes 2
  • Red Hat Ceph Storage 9.2
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat JBoss Enterprise Application Platform 7
  • Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7 Server
  • Red Hat JBoss Enterprise Application Platform 8
  • Red Hat JBoss Enterprise Application Platform Expansion Pack
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat OpenStack Platform 16.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66412
  2. 2026-10-03 Alias added: GHSA-v4hv-rgfq-gp49
  3. 2026-10-21 Fix available: RHSA-2026:86618 · Red Hat
  4. 2026-10-21 Fix available: Red Hat Ceph Storage 9.2 · Red Hat

References

Patch 1

Advisory 2

Other 3

  • TI-2026-60076 Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR CVSS 4.0HIGH 8.6
  • TI-2026-60080 Angular: SSR XSS via Unescaped <template> Content Across DocumentFragment Boundaries in Fallback Raw-Content Elements CVSS 4.0HIGH 8.6
  • TI-2026-60078 Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements CVSS 4.0HIGH 8.6
  • TI-2025-37971 A reflected cross-site scripting (XSS) vulnerability in CKeditor v46.1.0 & Angular… CVSS 3.1MEDIUM 5.4
  • TI-2026-36931 Angular: URL Parser Differential in @angular/platform-server leading to SSRF Allowlist Bypass CVSS 4.0HIGH 8.8
  • TI-2026-34131 Angular: SSRF via Hostname Hijacking in @angular/platform-server CVSS 4.0HIGH 8.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences