CVE-2026-50055 — Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable Expansion

CVE-2026-50055

Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction via Variable Expansion PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Zimbra / Zimbra Collaboration Suite	affected 0 before 10.1.20

CWE

CWE-863

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.