Medium severity6.5NVD Advisory· Published Feb 9, 2021· Updated Jun 17, 2026

CVE-2021-21126

Description

Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension.

Affected products

Google/Chromellm-fuzzy2 versions
<88.0.4324.96+ 1 more
- (no CPE)range: <88.0.4324.96
- (no CPE)range: unspecified
osv-coords7 versions
pkg:rpm/opensuse/chromium&distro=openSUSE%20Leap%2015.1 pkg:rpm/opensuse/chromium&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/chromium&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/libqt5-qtwebengine&distro=openSUSE%20Leap%2015.2 pkg:rpm/suse/chromium&distro=SUSE%20Package%20Hub%2015%20SP1 pkg:rpm/suse/chromium&distro=SUSE%20Package%20Hub%2015%20SP2 pkg:rpm/suse/libqt5-qtwebengine&distro=SUSE%20Package%20Hub%2015%20SP2
< 88.0.4324.96-lp151.2.171.1+ 6 more
- (no CPE)range: < 88.0.4324.96-lp151.2.171.1
- (no CPE)range: < 88.0.4324.96-lp152.2.66.1
- (no CPE)range: < 93.0.4577.82-1.1
- (no CPE)range: < 5.15.3-lp152.3.3.4
- (no CPE)range: < 88.0.4324.96-bp151.3.156.1
- (no CPE)range: < 88.0.4324.96-bp152.2.53.1
- (no CPE)range: < 5.15.3-bp152.3.3.1

Patches

Vulnerability mechanics

References

chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.htmlnvdRelease NotesVendor Advisory
crbug.com/1108126nvdPermissions RequiredThird Party Advisory
msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21126nvdThird Party Advisory

News mentions

No linked articles in our index yet.

cvss	0.423
epss	0.007
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000