Vulnerability

CVE-2026-11308

Medium· 6.3CVSS6.3EPSS0%

.rules3/5

Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.53 allowed an attacker who convinced a user to install a malicious extension to perform privilege escalation via a crafted Chrome Extension. (Chromium security

Threat signal

63/100

Elevated

Severity

medium

CVSS

6.3

EPSS

Active

CVSS

v3.1via NVDOpen in FIRST calculator →

6.3/ 10MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionRequiredRequires user action (click, file open, etc).
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactLowSome data disclosure; attacker doesn't fully control what.
Integrity ImpactLowSome data modification; attacker doesn't fully control extent.
Availability ImpactLowReduced performance / interruptions.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

0.02%

probability of exploitation in next 30 days

higher than 5% of all CVEs

3-day trend↑ 0pp

Low exploitation likelihood — defer if no other signals fire.

Vendor VEX

No VEX statements published for CVE-2026-11308. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCDefer

No exploitation, limited impact or prevalence

exploitation: none
automatable: no
impact: partial
mission: support

Lifecycle

2026-06-05Published
2026-06-05Vendor advisory · microsoftCVE-2026-11308 — Chromium: CVE-2026-11308 Inappropriate implementation in Extensions
2026-06-08Last modified1 source

Entity graph

2 nodes · 1 edges · click to pivot

CVEActorVendor advisoryIOCNews

Vendor advisories

microsoftCVE-2026-11308Chromium: CVE-2026-11308 Inappropriate implementation in Extensions

References

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.