Medium4.7Red Hat Linux

Medium [CVE-2026-54267] @angular/core: Angular Client Hydration DOM Clobbering & Response-Cache Poisoning

This medium-severity Red Hat Linux advisory covers CVE-2026-54267.

CVE-2026-54267 Published Jun 22, 2026Updated by vendor Jun 22, 2026

CVE-2026-54267

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.1, 21.2.17, and 20.3.25, to optimize client-side bootstrap in Server-Side Rendered (SSR) environments, Angular supports Hydration via provideClientHydration().

During SSR, Angular serializes the application's runtime state (such as cached HttpClient responses) and outputs it into the HTML stream as a

Affected versions

< 22.0.1
< 21.2.17
< 20.3.25

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Fixed versions

22.0.1
21.2.17
20.3.25

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

No mitigation is required. Red Hat products are not affected by this vulnerability, as detailed in the statement above.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

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