CVE-2026-50055
Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable Expansion
- State
- Published
- Severity
- 6.5 Medium
- Published
- Oct 8, 2026
- Updated
- Oct 8, 2026
- Reserved
- Jun 3, 2026
Description
A policy-enforcement flaw in Zimbra Collaboration Suite allows an authenticated user to bypass disabled mail forwarding by using a Sieve notify action to send copies of email content and headers to an arbitrary address.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | rapid7 |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
Zimbra Collaboration SuiteZimbra |
|
References
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisoriesvendor-advisory
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