Feed subscriptions could leak NTLM credentials on Windows
Historical advisory recorded 10 Nov 2026 21:21:24 UTC. Read the latest advisory.
cve-program · CVE-2026-126134
PublishedThunderbird 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.
Read the publisher's advisoryAffected versions, risk and source history
cve-program · CVE-2026-126134
PublishedFeed subscriptions could leak NTLM credentials on Windows
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.
- Source published
- 10 Nov 2026 18:59:55 UTC
- Source modified
- 10 Nov 2026 18:59:55 UTC
- Saved here
- 10 Nov 2026 21:21:24 UTC
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