CVE-2026-10632 Zimbra Collaboration Suite Classic Web Client Reflected Cross-Site Scripting via Document Editor Packages Parameter
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-10632?
CVE-2026-10632 is a high-severity vulnerability in Zimbra Collaboration Suite, published on 23 Oct 2026.
Official description
A reflected cross-site scripting vulnerability in the Classic Web Client of Zimbra Collaboration Suite (ZCS) allows an attacker to inject JavaScript through the packages parameter of the /h/rest document editor. The editor inserts package names into script attributes without HTML encoding. When combined with CVE-2026-50053, an attacker with an ordinary Zimbra account can supply their own authentication token and document identifiers in a URL and execute JavaScript in another signed-in user's Zimbra browser session when that user opens the URL. This permits reading mailbox data and performing authenticated actions as the victim. The issue affects ZCS 10.1.16 and was remediated in 10.1.17.
Weakness: CWE-79
Which versions are affected by CVE-2026-10632?
How do I fix CVE-2026-10632?
No fix has been published for CVE-2026-10632 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-10632 being exploited?
There is no known exploitation of CVE-2026-10632 in the wild and no public exploit code.
Sources
Also known as GHSA-rjjq-j274-2p2c.