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CVE-2026-69151· NVD / CVE Program· CNA GitHub_M

Angular i18n: Cross-Site Scripting (XSS) via event-handler attributes

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.27, 21.2.19, and 22.0.1, the Angular compiler i18n pipeline permits i18n-onerror and other i18n-on event-handler attributes, allowing a lower-trust translation file to replace a static handler with executable JavaScript. This issue is fixed in versions 20.3.27, 21.2.19, and 22.0.1.

HighCVSS 7.6 · v4.0—No exploit Fix available
Published
Aug 3, 2026
Updated
Aug 11, 2026
EPSS
0.3% · 24th percentile
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Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
7.6
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

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Affected systems

VendorProduct
angularangular

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • angular angularup to 19.2.25 inclusive
  • angular angular20.0.0 and later · before 20.3.27
  • angular angular21.0.0 and later · before 21.2.19
  • angular angular22.0.0 and later · before 22.0.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • @angular compiler

    • >= 22.0.0-next.0, < 22.0.1, >= 21.0.0-next.0, < 21.2.19, < 20.3.27affected

  • @angular core

    • >= 22.0.0-next.0, < 22.0.1, >= 21.0.0-next.0, < 21.2.19, < 20.3.27affected

  • angular angular

    • >= 22.0.0-next.0, < 22.0.1, >= 21.0.0-next.0, < 21.2.19, < 20.3.27affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12angular.jsall versions—
npm@angular/compilerfrom 20.0.0-next.0 · before 20.3.2720.3.27
npm@angular/compilerfrom 21.0.0-next.0 · before 21.2.1921.2.19
npm@angular/compilerfrom 22.0.0-next.0 · before 22.0.122.0.1
npm@angular/compilerup to and including 19.2.25—
npm@angular/corefrom 20.0.0-next.0 · before 20.3.2720.3.27
npm@angular/corefrom 21.0.0-next.0 · before 21.2.1921.2.19
npm@angular/corefrom 22.0.0-next.0 · before 22.0.122.0.1
npm@angular/coreup to and including 19.2.25—

Same product

angular: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-68945Angular: Cache-Key Ambiguity in HttpTransferCache Leading to Cross-Request Response Reuse and State Poisoning
    35Monitor
  • CVE-2026-50168Angular: URL Parser Differential in @angular/platform-server leading to SSRF Allowlist Bypass
    35Monitor
  • CVE-2026-46417Angular: SSRF via Hostname Hijacking in @angular/platform-server
    35Monitor
  • CVE-2026-54266Angular: Weak 32-Bit Cache Key Hashing in `HttpTransferCache` Leading to Cross-Request Data Leakage and State Poisoning
    35Monitor
  • CVE-2026-88060Angular: SSR XSS via Unescaped <template> Content Across DocumentFragment Boundaries in Fallback Raw-Content Elements
    34Monitor
  • CVE-2026-88058Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements
    34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
npm:@angular/compiler20.3.27Package registry (OSV)
npm:@angular/compiler21.2.19Package registry (OSV)
npm:@angular/compiler22.0.1Package registry (OSV)
npm:@angular/core20.3.27Package registry (OSV)
npm:@angular/core21.2.19Package registry (OSV)
npm:@angular/core22.0.1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-691490 days apartAngular SSR: Missing Fallback Raw-Content Serialization Escaping leads to Cross-Site Scripting (XSS)
    34Monitor
  • CVE-2026-8805838 days apartAngular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements
    34Monitor
  • CVE-2026-8806038 days apartAngular: SSR XSS via Unescaped <template> Content Across DocumentFragment Boundaries in Fallback Raw-Content Elements
    34Monitor
  • CVE-2026-5055542 days apartAngular: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in @angular/platform-server
    34Monitor
  • CVE-2026-5055642 days apartAngular: Missing `<noscript>` Raw-Text Serialization Escaping leads to Cross-Site Scripting (XSS) in Angular SSR
    34Monitor
  • CVE-2026-5426742 days apartAngular Client Hydration DOM Clobbering & Response-Cache Poisoning
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/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-secondary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records