Affects Google Chrome browser (Dawn renderer); sandbox escape risk could impact many organizations.
CVE-2026-10909
Use-after-free in Dawn (Chrome) enables sandbox escape via crafted HTML.
Is CVE-2026-10909 being exploited?
Not confirmed. CVE-2026-10909 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 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-10909?
CVE-2026-10909 is rated High with a CVSS score of 8.3. 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-2026-10909?
Yes. A fix has been recorded for CVE-2026-10909. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-10909 affect?
CVE-2026-10909 affects Google Chrome (Dawn renderer). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-10909?
Update Chrome to 149.0.7827.53+ across endpoints.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker with renderer access can escape the Chrome sandbox, gaining higher privileges.
Patch when possible
- affected< 149.0.7827.53
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.