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7.8
ytnef may let attackers tamper with email attachments
published 4 days ago
Summary
The ytnef program used to decode TNEF email files can be tricked into processing specially crafted data. An attacker could modify or read the contents of the decoded message, potentially exposing sensitive information. Update to the latest version of ytnef or apply the vendor's recommended patches to mitigate the risk.
What to do
- Update cleanstart ytnef to version 1.9.3-r1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| CleanStart | cleanstart | ytnef |
< 1.9.3-r1 Fix: upgrade to 1.9.3-r1
|
Original advisory text
In ytnef 1
Security vulnerability affects the ytnef package. In ytnef 1.
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker full control (estimated)
Timeline
Published31 Oct 2026
Updated31 Oct 2026
First seen31 Oct 2026
Sources
CLEANSTART-2023-DS42766 · OSV
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