This update includes 26 security fixes. Below, we highlight fixes that were contributed by external researchers.
[$8000] High CVE-2016-1630: Same-origin bypass in Blink. Credit to Mariusz Mlynski.
[$7500] High CVE-2016-1631: Same-origin bypass in Pepper Plugin. Credit to Mariusz Mlynski.
[$5000] High CVE-2016-1632: Bad cast in Extensions. Credit to anonymous.
[$3000] High CVE-2016-1633: Use-after-free in Blink. Credit to cloudfuzzer.
[$3000] High CVE-2016-1634: Use-after-free in Blink. Credit to cloudfuzzer.
[$2000] High CVE-2016-1635: Use-after-free in Blink. Credit to Rob Wu.
[$2000] High CVE-2016-1636: SRI Validation Bypass. Credit to ryan#cyph.com.
[$500] High CVE-2015-8126: Out-of-bounds access in libpng. Credit to joerg.bornemann.
[$2000] Medium CVE-2016-1637: Information Leak in Skia. Credit to Keve Nagy.
[$1000] Medium CVE-2016-1638: WebAPI Bypass. Credit to Rob Wu.
[$1000] Medium CVE-2016-1639: Use-after-free in WebRTC. Credit to Khalil Zhani.
[$1000] Medium CVE-2016-1640: Origin confusion in Extensions UI. Credit to Luan Herrera.
[$500] Medium CVE-2016-1641: Use-after-free in Favicon. Credit to Atte Kettunen of OUSPG.
We would also like to thank all security researchers that worked with us during the development cycle to prevent security bugs from ever reaching the stable channel. An additional $14,500 in rewards were issued for security bugs present on non-stable channels.
As usual, our ongoing internal security work was responsible for a wide range of fixes:
 CVE-2016-1642: Various fixes from internal audits, fuzzing and other initiatives.
Many of our security bugs are detected using AddressSanitizer, MemorySanitizer or Control Flow Integrity.