Vulnerability Report

CVE-2026-102489

RCE CISA KEV Active

Title: Zammad Session Hijack leading to RCE

RCE

Proof Of Concept

PoC Available for CVE-2026-102489

CWE Category NVD-CWE-noinfo

Published Date Sep 30, 2026

Modified Date Oct 10, 2026

Exploit Status Available

Score 9.4 CVSS v4.0

Exploit Probability (EPSS)

1.26%

Vulnerability Summary

CVE-2026-102489: Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The bug is also present in version 7.0.0 to version 7.1.2, but not exploitable due to changes in the underlying framework.

Impacted Vendors

docker 1

zammad 1

Reference Links

https://csirt.divd.nl/CVE-2026-102489 https://csirt.divd.nl/DIVD-2026-00015

CVSS v4.0

Source Entity [email protected]

Severity CRITICAL

9.4

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

PASSIVE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

N/A

RAW VECTOR

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:C/RE:X/U:X

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-102489 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/horizon3ai/CVE-2026-102489

View Code

GitHub https://github.com/Hunt-Benito/the-cookie-in-the-error-message-cve-2026-102489-zammad-session-hijack-to-rce

View Code

October 10, 2026 MODIFIED