[CVE-2026-102489] Zammad GmbH Zammad — Zammad GmbH Zammad Session Fixation Vulnerability

What happened?

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. Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable.

Key details

• Linux kernel ebtables SNAT target has an out-of-bounds write flaw.
• ARP sender hardware address rewrite can write into a nonlinear socket-buffer fragment.
• The fragment is backed by a splice-imported file page.
• Impacted products may be end-of-life or end-of-service.
• Users should discontinue use or move to a supported version.
• Forensic triage is required per BOD 26-04.

Summarised by SecOraLens from CISA KEV. Always read the original source before acting. How SecOraLens verifies advisories.