CVE-2026-126134
Received Received - Intake

Thunderbird NTLM Credential Leak via feed: URL Subscription

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: Mozilla Corporation

Description
Thunderbird allowed feed subscriptions to file: URLs that point to a network share. If a user was tricked into subscribing to such a URL, Thunderbird connected to the attacker's server when fetching the feed. Windows then sent the user's NTLM credentials to that server. This bug only affects Thunderbird on Windows. Other operating systems are unaffected. This vulnerability was fixed in Thunderbird 160 and Thunderbird 153.7.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-126134
EUVD
EUVD-2026-122688

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla thunderbird 160
mozilla thunderbird 153.7

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CWE ID Description
CWE-UNKNOWN

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