The latest version of Google Chrome also introduces HTTPS as the browser’s default protocol.

Google this week released Chrome 90 to the stable channel for Windows, Mac, and Linux. The update, which will roll out over the coming days and weeks, brings 37 security fixes, HTTPS by default, and other updates to the browser.

Chrome 90.0.4430.72 fixes six high-severity vulnerabilities, 10 medium-severity vulnerabilities, and three low-severity flaws reported by external security researchers, in addition to fixes for flaws discovered by its internal team. The Department of Homeland Security’s Cybersecurity and Infrastructure Security Agency (CISA) made note of these patches in an advisory published today.

Google reported last month that in version 90, Chrome’s address bar would use https:// by default. Before, if a person typed “” into the address bar, the browser would choose http:// as the default protocol – with the exception of websites in the HSTS preload list, which Chrome will always default to HTTPS.

In Chrome 90, the browser will now default to HTTPS for most typed websites that don’t specify a protocol. IP addresses, single label domains, and reserved hostnames such as test/ or localhost/ will continue to default to HTTP, Google notes in a blog post on the change. For sites that don’t support HTTPS, Chrome will fall back to HTTP when the HTTPS attempt fails.

The HTTPS change will first appear on Chrome Desktop and Chrome for Android in version 90, with a release for Chrome on iOS following “soon after,” Google reports.

Stable Channel Update for Desktop

Wednesday, April 14, 2021

 The Chrome team is delighted to announce the promotion of Chrome 90 to the stable channel for Windows, Mac and Linux. This will roll out over the coming days/weeks.

Chrome 90.0.4430.72 contains a number of fixes and improvements — a list of changes is available in the log. Watch out for upcoming Chrome and Chromium blog posts about new features and big efforts delivered in 90.

Security Fixes and Rewards

Note: Access to bug details and links may be kept restricted until a majority of users are updated with a fix. We will also retain restrictions if the bug exists in a third party library that other projects similarly depend on, but haven’t yet fixed.

This update includes 37 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.

[$20000][1025683] High CVE-2021-21201: Use after free in permissions. Reported by Gengming Liu and Jianyu Chen when working at Tencent KeenLab on 2019-11-18

[$10000][1188889] High CVE-2021-21202: Use after free in extensions. Reported by David Erceg on 2021-03-16

[$5000][1192054] High CVE-2021-21203: Use after free in Blink. Reported by asnine on 2021-03-24

[$1000][1189926] High CVE-2021-21204: Use after free in Blink. Reported by Chelse Tsai-Simek, Jeanette Ulloa, and Emily Voigtlander of Seesaw on 2021-03-19

[$TBD][1165654] High CVE-2021-21205: Insufficient policy enforcement in navigation. Reported by Alison Huffman, Microsoft Browser Vulnerability Research on 2021-01-12

[$TBD][1195333] High CVE-2021-21221: Insufficient validation of untrusted input in Mojo. Reported by Guang Gong of Alpha Lab, Qihoo 360 on 2021-04-02

[$5000][1185732] Medium CVE-2021-21207: Use after free in IndexedDB. Reported by koocola (@alo_cook) and Nan Wang (@eternalsakura13) of 360 Alpha Lab on 2021-03-08

[$3000][1039539] Medium CVE-2021-21208: Insufficient data validation in QR scanner. Reported by Ahmed Elsobky (@0xsobky) on 2020-01-07

[$3000][1143526] Medium CVE-2021-21209: Inappropriate implementation in storage. Reported by Tom Van Goethem (@tomvangoethem) on 2020-10-29

[$3000][1184562] Medium CVE-2021-21210: Inappropriate implementation in Network. Reported by @bananabr on 2021-03-04

[$2000][1103119] Medium CVE-2021-21211: Inappropriate implementation in Navigation. Reported by Akash Labade (m0ns7er) on 2020-07-08

[$500][1145024] Medium CVE-2021-21212: Incorrect security UI in Network Config UI. Reported by Hugo Hue and Sze Yiu Chau of the Chinese University of Hong Kong on 2020-11-03

[$N/A][1161806] Medium CVE-2021-21213: Use after free in WebMIDI. Reported by raven (@raid_akame)  on 2020-12-25

[$TBD][1170148] Medium CVE-2021-21214: Use after free in Network API. Reported by Anonymous on 2021-01-24

[$TBD][1172533] Medium CVE-2021-21215: Inappropriate implementation in Autofill. Reported by Abdulrahman Alqabandi, Microsoft Browser Vulnerability Research on 2021-01-30

[$TBD][1173297] Medium CVE-2021-21216: Inappropriate implementation in Autofill. Reported by Abdulrahman Alqabandi, Microsoft Browser Vulnerability Research on 2021-02-02

[$500][1166462] Low CVE-2021-21217: Uninitialized Use in PDFium. Reported by Zhou Aiting (@zhouat1) of Qihoo 360 Vulcan Team on 2021-01-14

[$500][1166478] Low CVE-2021-21218: Uninitialized Use in PDFium. Reported by Zhou Aiting (@zhouat1) of Qihoo 360 Vulcan Team on 2021-01-14

[$500][1166972] Low CVE-2021-21219: Uninitialized Use in PDFium. Reported by Zhou Aiting (@zhouat1) of Qihoo 360 Vulcan Team on 2021-01-15

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.

As usual, our ongoing internal security work was responsible for a wide range of fixes:

  • [1198709] Various fixes from internal audits, fuzzing and other initiatives

Many of our security bugs are detected using AddressSanitizer, MemorySanitizer, UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL.

Interested in switching release channels?  Find out how here. If you find a new issue, please let us know by filing a bug. The community help forum is also a great place to reach out for help or learn about common issues.

Thank you,
Srinivas Sista