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CVE-2026-50557

Severity CVSS v4.0:
MEDIUM
Type:
CWE-79 Cross-Site Scripting (XSS)
Publication date:
22/06/2026
Last modified:
09/07/2026

Description

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.15, 20.3.22 and 19.2.22, an issue in the @angular/compiler and @angular/core packages allows bypassing element and attribute sanitization/validation through specific namespace workarounds. Specifically, namespaced script elements (e.g., or ) were not properly identified as script elements by the Angular template preparser, allowing them to pass through template compilation without being stripped. Furthermore, security context schema mappings for element attributes did not consistently handle attributes within namespaced elements (like SVG and MathML), opening up gaps where malicious namespaced attributes could bypass runtime and compile-time sanitizers. Combined, these flaws enable an attacker who can inject or supply a template/tag structure with custom namespaces to bypass Angular's script-stripping logic and attribute sanitizers, leading to client-side Cross-Site Scripting (XSS). This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22 and 19.2.22.

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 5.30 MEDIUM
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): Passsive
Confidentiality (VC): Low
Integrity (VI): Low
Availability (VA): None
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
5.30
Severity 4.0
MEDIUM
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
6.10
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* 18.2.14 (including)
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* 19.0.0 (including) 19.2.22 (excluding)
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* 20.0.0 (including) 20.3.22 (excluding)
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* 21.0.0 (including) 21.2.15 (excluding)
cpe:2.3:a:angular:angular:22.0.0:next0:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next1:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next10:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next11:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next12:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next2:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next3:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next4:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next5:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next6:*:*:*:node.js:*:*
cpe:2.3:a:angular:angular:22.0.0:next7:*:*:*:node.js:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools