CVE-2026-59782 JavaScript preprocessing memory disclosure
A limited administrator can read raw heap data from the Duktape engine, potentially leaking sensitive information from other preprocessors.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-59782?
CVE-2026-59782 is a medium-severity vulnerability in Zabbix, published on 5 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The JavaScript preprocessing (Duktape) engine on Zabbix server has a vulnerability where a limited administrator is able to read raw heap data potentially resulting in leaked data from other running preprocessors not available to said administrator.
Weakness: CWE-125
Which versions are affected by CVE-2026-59782?
How do I fix CVE-2026-59782?
Apply the vendor's patch.
Is CVE-2026-59782 being exploited?
There is no known exploitation of CVE-2026-59782 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-59782, GHSA-wg6x-hw9j-7vg6, UBUNTU-CVE-2026-59782.