Is CVE-2026-10632 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-10632 being exploited in the wild.

How severe is CVE-2026-10632?

High severity, with a CVSS score of 8.7, published 23 October 2026.

Which products and versions are affected?

Zimbra Collaboration Suite 10.1.16.

Is there a fix for CVE-2026-10632?

Yes: fixed in 10.1.17. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-10632 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-10632?

Check whether you run Zimbra Collaboration Suite at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-10632: Zimbra Collaboration Suite reflected XSS in Classic Web Client

CVE-2026-10632 · Severity: high · CVSS 8.7 · Published 2026-10-23

Zimbra Collaboration Suite is an enterprise email and collaboration platform used by organizations for messaging, calendars, and document sharing. A reflected cross-site scripting flaw in the Classic Web Client allows an attacker with a valid account to craft a malicious link that executes JavaScript in another user's browser session, enabling theft of emails, calendar data, and execution of actions as the victim. When combined with another vulnerability, attackers can trick users into clicking a link without needing direct account compromise.

Technologies: Zimbra Collaboration Suite. Vendors: Zimbra.

Quick answers

Is CVE-2026-10632 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-10632 being exploited in the wild.
How severe is CVE-2026-10632?: High severity, with a CVSS score of 8.7, published 23 October 2026.
Which products and versions are affected?: Zimbra Collaboration Suite 10.1.16.
Is there a fix for CVE-2026-10632?: Yes: fixed in 10.1.17. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-10632 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-10632?: Check whether you run Zimbra Collaboration Suite at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 10.1.17

Technical details

The vulnerability is a reflected XSS in the /h/rest document editor endpoint where the packages parameter is inserted into script attributes without HTML encoding. An attacker with an ordinary Zimbra account can supply a crafted URL containing malicious JavaScript; if a signed-in user opens this URL, the script executes in their session context. Combined with CVE-2026-50053, this permits reading mailbox data and performing authenticated actions as the victim.

Affected products

Zimbra Collaboration Suite 10.1.16

Timeline

2026-10-23: disclosed

References

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