Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading filename. This vulnerability was fixed in Thunderbird 154 and Thunderbird 153.2.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Thunderbird | affected |
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Project Subscriptions
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Advisories
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Fixes
Solution
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Workaround
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References
History
Tue, 01 Sep 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading filename. This vulnerability was fixed in Thunderbird 154 and Thunderbird 153.2. | |
| Title | Calendar invitation attachments could launch local executables | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: mozilla
Published:
Updated: 2026-09-01T21:44:14.831Z
Reserved: 2026-09-01T21:25:08.170Z
Link: CVE-2026-84637
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-01T22:17:19.597
Modified: 2026-09-01T22:17:19.597
Link: CVE-2026-84637
Redhat
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OpenCVE Enrichment
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Weaknesses
No weakness.