Insufficient policy enforcement in QR scanning in Google Chrome on iOS prior to 89.0.4389.72 allowed an attacker who convinced the user to…

published 2021-03-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8577

cvss: 4.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

Insufficient policy enforcement in QR scanning in Google Chrome on iOS prior to 89.0.4389.72 allowed an attacker who convinced the user to scan a QR code to bypass navigation restrictions via a crafted QR code.

Patch / fix

fixed in 1 distros 5

Google Chrome 89.0.4389.72

debian ubuntu opensuse alpine arch linux

chromium Debian 14, Debian 13, Debian 12 89.0.4389.82-1

debian advisories DEBIAN-CVE-2021-21186

chromium-browser Ubuntu 16.04 LTS 89.0.4389.82-0ubuntu0.16.04.1
chromium-browser Ubuntu 18.04 LTS 89.0.4389.82-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2021-21186

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

chromium openSUSE Tumbleweed 93.0.4577.82-1.1
chromium openSUSE Tumbleweed 113.0.5672.92-1.1
chromium Package Hub 15 SP2 89.0.4389.72-bp152.2.62.1
chromium openSUSE Leap 15.2 89.0.4389.72-lp152.2.77.1

opensuse advisories openSUSE-SU-2024:10681-1 openSUSE-SU-2024:12948-1 openSUSE-SU-2021:0401-1 openSUSE-SU-2021:0392-1

chromium Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 89.0.4389.72-r0

alpine advisories ALPINE-CVE-2021-21186

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

chromium Arch Linux 89.0.4389.72-1
vivaldi Arch Linux 3.7.2218.45-1

arch linux advisories AVG-1631 AVG-1633

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-21186 updated 2025-11-21 cvss 4.3

chromium-browser: Insufficient policy enforcement in QR scanning

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.13% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

Google Chrome

Classification

Weakness

CWE-863 Incorrect Authorization

Technology feeds

Google Chrome rss critical rss

References

lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/FE5SIKEVYTMDCC5OSXGOM2KRPYLHYMQX/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/BBT54RKAE5XLMWSHLVUKJ7T2XHHYMXLH/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/LCIDZ77XUDMB2EBPPWCQXPEIJERDNSNT/
vendor-advisory
debian.org /security/2021/dsa-4886
vendor-advisory, third-party-advisory
security.gentoo.org /glsa/202104-08
vendor-advisory, third-party-advisory
chromereleases.googleblog.com /2021/03/stable-channel-update-for-desktop.html
release-notes, vendor-advisory
crbug.com /1153445
permissions-required

Sources

CVE List CVE-2021-21186
NVD CVE-2021-21186

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary