CVE-2026-54264
Info disclosure via Angular service-worker on cross-origin redirects.
Is CVE-2026-54264 being exploited?
Not confirmed. CVE-2026-54264 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-54264?
CVE-2026-54264 is rated High. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-54264?
Yes. A fix has been recorded for CVE-2026-54264. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54264 affect?
CVE-2026-54264 affects Angular @angular/service-worker (pre-22.0.1, pre-21.2.17, pre-20.3.25). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54264?
Update to fixed service-worker versions (22.0.1/21.2.17/20.3.25).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Exposes Authorization tokens, session cookies, or proxy credentials via cross-origin redirects from the service worker.
Patch when possible
- affected>= 22.0.0-next.0 and < 22.0.1
- affected>= 21.0.0-next.0 and < 21.2.17
- affected>= 20.0.0-next.0 and < 20.3.25
- affected<= 19.2.25
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.