Exposure of Sensitive Information to an Unauthorized Actor Affecting thunderbird package, versions [,153.6)[154,159)
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-21755963
- published27 Oct 2026
- disclosed27 Oct 2026
- creditUnknown
Introduced: 27 Oct 2026
NewCVE-2026-118178 (opens in a new tab)How to fix?
Upgrade thunderbird to version 153.6, 159 or higher.
Overview
Affected versions of this package are vulnerable to Exposure of Sensitive Information to an Unauthorized Actor via the handling of RSS feed redirection using the itunes:new-feed-url or newLocation elements. An attacker can cause the application to read local files or, on Windows, connect to a remote network share and potentially leak NTLM credentials by supplying a malicious feed or modifying a feed delivered over HTTP. This is only exploitable if the application is running on Windows for NTLM credential leakage; on other operating systems, only local file reading is possible.