CVE-2026-102489
Zammad GmbH Zammad Session Fixation Vulnerability - [Actively Exploited]
Description
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.
INFO
Published Date :
Sept. 30, 2026, 5:16 p.m.
Last Modified :
Oct. 10, 2026, 4:18 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
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.
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. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Unknown
https://zammad.com/en/product/releases/ ; https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-102489
Affected Products
The following products are affected by CVE-2026-102489
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | b87402ff-ae37-4194-9dae-31abdbd6f217 | ||||
| CVSS 4.0 | CRITICAL | b87402ff-ae37-4194-9dae-31abdbd6f217 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update Zammad to a patched version.
- Apply vendor security updates promptly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-102489.
| URL | Resource |
|---|---|
| https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 | Vendor Advisory |
| https://csirt.divd.nl/CVE-2026-102489 | Third Party Advisory |
| https://csirt.divd.nl/DIVD-2026-00015 | Third Party Advisory |
| https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 | Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489 | US Government Resource |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-102489 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-102489
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-102489 vulnerability anywhere in the article.
-
The Hacker News
⚡ Weekly Recap: Helpdesk 0-Days, Rogue Certs, ShinyHunters Arrest, AI-Fooling Malware and More
Some meetings last longer than it took attackers to jump on a newly disclosed security flaw this week. Within hours, they were already testing it. That's not much time to read the warning, let alone d ... Read more
-
The Hacker News
ThreatsDay: AI-Powered Zero-Day Chain, 543K Live Secrets, Model Inspection RCE and 13 More Stories
This week, the useful words are boring ones: inspect, cache, compile, store, trust. Each sounds harmless. Each can become an attack path when a system does a little more than people expect. A model ch ... Read more
-
security.nl
Zerodaylekken in ticketsysteem Zammad gebruikt bij hack van DIVD
Het Dutch Institute for Vulnerability Disclosure (DIVD) is onlangs gehackt via twee zerodaylekken in helpdesksoftware en ticketsysteem Zammad, zo heeft het zelf bekendgemaakt. Het Nationaal Cyber Secu ... Read more
The following table lists the changes that have been made to the
CVE-2026-102489 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 10, 2026
Action Type Old Value New Value Removed SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-09T15:59:10.993019Z'} Added SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T00:00:00+00:00'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 09, 2026
Action Type Old Value New Value Removed SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T00:00:00+00:00'} Added SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-09T15:59:10.993019Z'} -
Modified Analysis by [email protected]
Oct. 07, 2026
Action Type Old Value New Value Changed CPE Configuration AND OR *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 6.3.0 up to (excluding) 6.5.4 *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (including) 7.1.3 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:a:docker:docker:-:*:*:*:*:*:*:* AND OR *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 6.3.0 up to (including) 6.5.4 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:a:docker:docker:-:*:*:*:*:*:*:* Added Reference Type Dutch Institute for Vulnerability Disclosure: https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 Types: Vendor Advisory Added Reference Type Dutch Institute for Vulnerability Disclosure: https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 Types: Vendor Advisory -
CVE Modified by [email protected]
Oct. 07, 2026
Action Type Old Value New Value Added Tag unsupported-when-assigned Changed Description 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 vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions. 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. Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/102xxx/CVE-2026-102489.json">CVE-2026-102489</a> Added Reference https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 Added Reference https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 03, 2026
Action Type Old Value New Value Removed SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T16:27:26.039890Z'} Added SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T00:00:00+00:00'} -
Modified Analysis by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489 Types: US Government Resource -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 02, 2026
Action Type Old Value New Value Added CWE CWE-384 Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489 Added SSVC {'id': 'CVE-2026-102489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T16:27:26.039890Z'} -
Initial Analysis by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-384 Added CPE Configuration AND OR *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 6.3.0 up to (excluding) 6.5.4 *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (including) 7.1.3 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:a:docker:docker:-:*:*:*:*:*:*:* Added Reference Type Dutch Institute for Vulnerability Disclosure: https://csirt.divd.nl/CVE-2026-102489 Types: Third Party Advisory Added Reference Type Dutch Institute for Vulnerability Disclosure: https://csirt.divd.nl/DIVD-2026-00015 Types: Third Party Advisory -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Oct. 02, 2026
Action Type Old Value New Value Added Date Added 2026-10-02 Added Due Date 2026-10-02 Added Required Action 2026-10-02 Added Vulnerability Name 2026-10-02 -
New CVE Received by [email protected]
Sep. 30, 2026
Action Type Old Value New Value Added Description 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 vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions. Added CVSS V4.0 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 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/102xxx/CVE-2026-102489.json">CVE-2026-102489</a> Added Reference https://csirt.divd.nl/CVE-2026-102489 Added Reference https://csirt.divd.nl/DIVD-2026-00015