Is CVE-2026-102490 exploited in the wild?

Yes. CVE-2026-102490 is known to be exploited in the wild, first recorded on 2 October 2026. Treat it as urgent.

How severe is CVE-2026-102490?

Critical severity, published 30 September 2026.

Which products and versions are affected?

Zammad 6.3.0 to 6.5.4, 7.0.0 to 7.1.3.

Is there a fix for CVE-2026-102490?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-102490 attacked?

It is attacked over the network.

Am I affected by CVE-2026-102490?

Check whether you run Zammad or Zammad Gmbh Zammad 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-2026-102490: Zammad session hijack leading to remote code execution

CVE-2026-102490 · Severity: critical · Exploited in the wild · Published 2026-09-30

Zammad, a customer support ticketing and communication platform, contains a session hijacking vulnerability that allows attackers to take over user sessions and execute arbitrary code as the zammad service user. Affected versions 6.3.0 through 6.5.4 are exploitable, while versions 7.0.0 through 7.1.3 contain the flaw but are not practically exploitable due to environmental protections. A successful attack grants an attacker full control over the ticketing system and underlying server.

Technologies: Zammad. Vendors: Zammad.

Quick answers

Is CVE-2026-102490 exploited in the wild?: Yes. CVE-2026-102490 is known to be exploited in the wild, first recorded on 2 October 2026. Treat it as urgent.
How severe is CVE-2026-102490?: Critical severity, published 30 September 2026.
Which products and versions are affected?: Zammad 6.3.0 to 6.5.4, 7.0.0 to 7.1.3.
Is there a fix for CVE-2026-102490?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-102490 attacked?: It is attacked over the network.
Am I affected by CVE-2026-102490?: Check whether you run Zammad or Zammad Gmbh Zammad 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.

Technical details

The vulnerability is a session hijack flaw in Zammad that enables remote code execution with the privileges of the zammad application user. Versions 6.3.0–6.5.4 are directly exploitable; versions 7.0.0–7.1.3 contain the same code path but mitigating factors prevent practical exploitation. Attack vectors and preconditions are not detailed in available references, but the session hijacking mechanism likely allows unauthenticated or low-privilege attackers to assume valid sessions.

Affected products

Zammad Zammad 6.3.0 to 6.5.4, 7.0.0 to 7.1.3

Identifiers

CVE-2026-102490
CVE-2026-102489

Timeline

2026-09-30: disclosed

References

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