GHSA-58w9-8g37-x9v5 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in @angular/compiler. A fix is available for @angular/compiler — see the affected versions and patch details below.
@angular/compiler: Two-Way Property Binding Sanitization Bypass (XSS)
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-58w9-8g37-x9v5.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
GHSA-58w9-8g37-x9v5 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 376,715 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
@angular/compilernpmDescription
An issue in the @angular/compiler package allows bypassing DOM property sanitization through the use of two-way property bindings.
Specifically, when a native DOM property that requires sanitization (such as innerHTML, srcdoc, src, href, data, or sandbox) is bound using the two-way binding syntax (e.g., [(innerHTML)]="value" or bindon-innerHTML="value"), the Angular template compiler failed to apply the appropriate schema-derived sanitizer resolution to the TwoWayProperty operation. As a result, native two-way DOM bindings were emitted without the required sanitizer function, whereas equivalent one-way bindings would be properly sanitized.
This flaw enables an attacker who can control the value of a two-way bound sensitive property to bypass Angular's built-in sanitization logic, potentially leading to client-side Cross-Site Scripting (XSS).
Impact
Any Angular application that uses two-way data binding ([()] or bindon-) on security-sensitive native DOM properties (like innerHTML, href on <a>, src on <img>/<iframe>, etc.) is vulnerable to this security bypass.
Once exploited, this allows a malicious actor to supply an unsanitized property binding value that bypasses core sanitization constraints. This could lead to the execution of arbitrary JavaScript within the target user's browser context, potentially resulting in session hijacking, sensitive data exposure, or unauthorized actions on behalf of the user.
Attack Preconditions
To successfully exploit this vulnerability, the following environment parameters and application states must concurrently exist:
- Two-Way Binding on Sensitive Properties: The application must bind to a sensitive native DOM property using the two-way binding syntax (e.g.,
<div [(innerHTML)]="userContent"></div>). - User-Controlled Input: The value bound to this property must be influenceable by user-controlled input.
- Absence of Additional Sanitization: The application does not perform separate manual sanitization (e.g., via
DomSanitizer) before passing the value to the bound property.
Patches
- 22.0.1
- 21.2.17
- 20.3.25
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @angular/compiler | ≥ 22.0.0-next.0&&< 22.0.1 | 22.0.1npm install @angular/compiler@22.0.1 |
| 📦npm | @angular/compiler | ≥ 21.0.0-next.0&&< 21.2.17 | 21.2.17npm install @angular/compiler@21.2.17 |
| 📦npm | @angular/compiler | ≥ 20.0.0-next.0&&< 20.3.25 | 20.3.25npm install @angular/compiler@20.3.25 |
| 📦npm | @angular/compiler | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @angular/compiler, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update @angular/compiler to 22.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-58w9-8g37-x9v5 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-58w9-8g37-x9v5 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-58w9-8g37-x9v5. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-58w9-8g37-x9v5 in your dependencies?
O3 Security finds GHSA-58w9-8g37-x9v5 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.