CVE-2021-21139

critical
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
9.5

Description

Inappropriate implementation in iframe sandbox in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-21139

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202102-4

OS impact

OSVersionStatusFixed in
arch archfixed3.6.2165.36-1
debian debianbookwormfixed88.0.4324.96-0.1
debian debianbullseyefixed88.0.4324.96-0.1
debian debianforkyfixed88.0.4324.96-0.1
debian debiansidfixed88.0.4324.96-0.1
debian debiantrixiefixed88.0.4324.96-0.1

References

Verify integrity in audit chain (admin only). AS-IS.