Affects ubiquitous platform (Chrome/WebView on Android); remote auth bypass could impact mobile apps and many devices across organizations.
CVE-2026-87534
Authorization bypass in Android WebView enabling remote access via crafted network traffic
Is CVE-2026-87534 being exploited?
Not confirmed. CVE-2026-87534 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 0.21% probability of exploitation in the next 30 days.
How severe is CVE-2026-87534?
CVE-2026-87534 is rated Critical with a CVSS score of 9.8. 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-2026-87534?
Yes. A fix has been recorded for CVE-2026-87534. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-87534 affect?
CVE-2026-87534 affects Chrome for Android <153.0.8010.36, Android WebView (embedded in apps), Android devices running affected versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-87534?
Update Chrome/WebView on Android to 153.0.8010.36 or later; prioritize mobile device fleets.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authorization bypass in Android WebView lets remote attackers (via crafted network traffic and social engineering) access restricted system resources or perform privileged actions.
Immediate action required
- affected< 153.0.8010.36
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.