What is CVE-2021-30596?

CVE-2021-30596 is a medium-severity vulnerability in Google Android, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2021-08-26.

How severe is CVE-2021-30596?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Google Android

CVE-2021-30596

Incorrect security UI in Navigation in Google Chrome on Android prior to 92.0.4515.131 allowed a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page.

Published 2021-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.017 (76.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Google Android
Google Chrome — versions unspecified
Fedoraproject Fedora — versions 33, 34, 35

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

chromereleases.googleblog.com/2021/08/the-stable-channel-has-been-updated-to.ht… (Release Notes, Vendor Advisory)
crbug.com/1214481 (Permissions Required, Exploit, Issue Tracking, Vendor Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2021-30596?: CVE-2021-30596 is a medium-severity vulnerability in Google Android, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2021-08-26.
How severe is CVE-2021-30596?: Medium severity. CVSS v3 base score is 4.3 out of 10.