CVE-2026-102489
Undisclosed RCE in Zammad v6.3 and higher
At a glance
- Source
- NVD
- EPSS
- EPSS 1.96 % · percentile 80 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- DIVD
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-384 — Session Fixation
References
- https://csirt.divd.nl/DIVD-2026-00015
- https://csirt.divd.nl/CVE-2026-102489
- https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490
- https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:A/AU:Y/V:C | DIVD |
| CVSS 4.0 | CRITICAL 9.4 | 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/AU:Y/V:C | DIVD |
| CVSS 4.0 | CRITICAL 9.4 | 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 | NVD · csirt@divd.nl (Secondary) |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-90080
- GCVE · GCVE-0-2026-102489
Affected configurations (NVD CPE)
cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*≥ 6.3.0 ≤ 6.5.4
Affected products
| Product | Versions |
|---|---|
| Zammad GmbH · Zammad | unknown * < 6.3.0 ; affected 6.3.0 < 6.5.4 ; unknown 7.0.0 < 7.1.3 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| CISA Known Exploited Vulnerabilities | CC0 1.0 |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |