Cross-site Request Forgery (CSRF) Affecting thunderbird package, versions [,150.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-THUNDERBIRD-16191783
- published24 Apr 2026
- disclosed21 Apr 2026
- creditUnknown
Introduced: 21 Apr 2026
CVE-2026-6755 (opens in a new tab)How to fix?
Upgrade thunderbird to version 150.0 or higher.
Overview
Affected versions of this package are vulnerable to Cross-site Request Forgery (CSRF) via the DOM postMessage component. An attacker can bypass implemented mitigations by crafting malicious messages that exploit the handling of cross-origin communication.