Loading
Loading
We use strictly necessary cookies to run this site, and analytics cookies to understand how it's used. See our Privacy Policy for details.
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.6
Patched in 45.0.0-alpha.6
Vulnerable: >= 44.0.0-alpha.1, < 44.3.0
Patched in 44.3.0
Vulnerable: >= 43.0.0-alpha.1, < 43.7.0
Patched in 43.7.0
Vulnerable: < 42.11.3
Patched in 42.11.3
Details
Pages opened into a new window from a link were loaded as if the app itself had navigated there rather than the page that contained the link, so the request was treated as same-site: SameSite=Strict cookies were sent and Sec-Fetch-Site did not identify the initiating page. Content shown in the app could use this to make a credentialed top-level request to another site that relies on SameSite cookies as a CSRF defence.
Apps are only affected if they load untrusted content and allow it to open new windows. Apps that deny new windows from untrusted content with setWindowOpenHandler are not affected.
Return { action: 'deny' } from setWindowOpenHandler for windows opened by untrusted content.
45.0.0-alpha.644.3.043.7.042.11.3If you have any questions or comments about this advisory, email us at [email protected]
EPSS, exploit probability
Low0.18%
estimated chance of real-world exploitation in the next 30 days, higher than 7.5% 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.
Talk to us about this
Find out whether this dependency (or others like it) is actually reachable in your codebase.
Get help patching, or building dependency-scanning into your pipeline going forward.
A secure code review or supply chain review finds this before an advisory does.