CVE-2026-10903
Use-after-free in Chrome WebRTC allows RCE via crafted HTML page
Is CVE-2026-10903 being exploited?
Not confirmed. CVE-2026-10903 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 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-10903?
CVE-2026-10903 is rated High with a CVSS score of 8.8. 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-2026-10903?
Yes. A fix has been recorded for CVE-2026-10903. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-10903 affect?
CVE-2026-10903 affects Google Chrome browser (all platforms) <= 149.0.7827.53, Chromium WebRTC component (Chrome). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-10903?
Update Chrome to 149.0.7827.53 or newer
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution in Chrome sandbox via WebRTC use-after-free from crafted HTML page; attacker could take control.
Immediate action required
- 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.