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.
Published: 2026-10-08
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 09 Oct 2026 09:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 08 Oct 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Zimbra
Zimbra zimbra Collaboration Suite
Vendors & Products Zimbra
Zimbra zimbra Collaboration Suite

Thu, 08 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
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.
Title Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable Expansion
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}


Subscriptions

Zimbra Zimbra Collaboration Suite
cve-icon MITRE

Status: PUBLISHED

Assigner: rapid7

Published:

Updated: 2026-10-08T19:10:22.565Z

Reserved: 2026-06-03T09:35:31.591Z

Link: CVE-2026-50055

cve-icon Vulnrichment

Updated: 2026-10-08T19:10:18.243Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-08T17:17:17.307

Modified: 2026-10-08T20:49:23.240

Link: CVE-2026-50055

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T18:45:17Z

Weaknesses