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A GitHub-reviewed security advisory, not necessarily under active exploitation the way our CISA KEV advisories are, but a real, disclosed vulnerability in an open-source dependency.
Affected packages
Vulnerable: >= 45.0.0-alpha.1, < 45.0.0-alpha.13
Patched in 45.0.0-alpha.13
Vulnerable: >= 44.0.0-alpha.1, < 44.5.0
Patched in 44.5.0
Vulnerable: >= 43.0.0-alpha.1, < 43.7.6
Patched in 43.7.6
Vulnerable: < 42.11.9
Patched in 42.11.9
Details
For pointerLock permission requests made from some cross-origin iframes, session.setPermissionRequestHandler() was given the top-level frame's requestingUrl and isMainFrame instead of the requesting frame's. Apps that grant pointer lock based on the requesting origin could grant it to embedded content under the top-level page's identity.
Apps are only affected if they embed untrusted content in iframes and decide pointerLock requests by origin in setPermissionRequestHandler. Apps that do not embed untrusted content, or that deny pointerLock for it, are not affected.
Deny the pointerLock permission for web contents that embed untrusted frames.
45.0.0-alpha.1344.5.043.7.642.11.9If you have any questions or comments about this advisory, email us at [email protected]
EPSS, exploit probability
Low0.21%
estimated chance of real-world exploitation in the next 30 days, higher than 10.3% of every CVE FIRST.org scores
Refreshed 10/22/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.
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