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Advisory severityMedium4.7Red 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.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-54267 Source published Source updated

VulniPulse record published Record updated

CVE-2026-54267
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

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

Is CVE-2026-54267 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-54267 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-54267?

Upgrade to a fixed release named by Red Hat:

  • 22.0.1
  • 21.2.17
  • 20.3.25

Confirm against the vendor advisory before you patch.

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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