CVE-2026-12456
published 2026-06-17CVE-2026-12456: Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension…
medium4.2CVSS 3.1
AVNACHPRNUIRSUCLILAN
EPSS
0.14%
3.5th percentile
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High)
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| chrome | >= 149.0.7827.155 < 149.0.7827.155 | 149.0.7827.155 | |
| chrome_desktop | — | — |
CVSS provenance
cvelistv5v3.14.2MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
vendor_redhat8.1HIGH
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Red Hat
chromium-browser: chromium-browser: Insufficient validation of untrusted input in Extensions
vendor_redhat·2026-06-17·CVSS 8.1
CVE-2026-12456 [HIGH] CWE-346 chromium-browser: chromium-browser: Insufficient validation of untrusted input in Extensions
chromium-browser: chromium-browser: Insufficient validation of untrusted input in Extensions
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High)
An insufficient validation of untrusted input flaw was found in the Extensions component of the Chromium browser.
Upstream bug(s):
https://code.google.com/p/chromium/issues/detail?id=517124587
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Chrome
Stable Channel Update for Desktop: CVE-2026-12455
vendor_chrome·2026-06-16
CVE-2026-12455 [HIGH] Stable Channel Update for Desktop: CVE-2026-12455
Stable Channel Update for Desktop
CVE-2026-12455: Use after free in Tab Strip. Reported by Google on 2026-05-27 [N/A][ 517124587 ] High CVE-2026-12456: Insufficient validation of untrusted input in Extensions
Reported by Google on 2026-05-27 [N/A][ 517153117 ] High CVE-2026-12457: Insufficient data validation in Extensions
Severity: high
CVEList
CVE-2026-12456: Inappropriate implementation in Extensions in Google Chrome prior to 149
cvelistv5·2026-06-17·CVSS 4.2
CVE-2026-12456 [MEDIUM] CWE-20 CVE-2026-12456: Inappropriate implementation in Extensions in Google Chrome prior to 149
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High)
GHSA
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted
ghsa_unreviewed·2026-06-17
CVE-2026-12456 [MEDIUM] CWE-20 Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High)
No detection rules found.
No public exploits indexed.
2026-06-17
Published