Is itCheck something

No. CVE-2026-102489

Zammad flaw lets attackers hijack a login session and run code

Being used now

Yes. Attackers are using this right now.

Teams that run their own Zammad help desk. Used together with another Zammad flaw.

What to do

Update Zammad to the latest version.

Confirmed in attacksOct 2, 2026
ProductZammad GmbH Zammad
GitHub repos2
Attack likelihood, next 30 days22%

Attack likelihood is EPSS, a daily estimate from FIRST.org of how likely this bug is to be used in attacks in the next 30 days.

The official description

Zammad GmbH Zammad contains a session fixation vulnerability that can lead to remote code execution as the zammad user. This vulnerability can be chained with CVE-2026-102490.

For your tech helper or AI assistant

A read-only checklist. Paste it into Claude, ChatGPT or a coding agent; it only looks and changes nothing.

Read-only check, change nothing, send nothing anywhere.
Is Zammad GmbH Zammad (CVE-2026-102489) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-102489. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.
Download playbook (.md)

Code on GitHub

Repos named after this bug. Some are scanners or write-ups, some are working attack code. Do not run them on a machine you care about.

Sources