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P5Verified
CVE-2026-18256: Mattermost 11.10.0 through 11.10.0, 11.7.0 through 11.7.9, 11.9.0 through 11.9.1, 11.8.0 through 11.8.5
CVE-2026-18256. CVSS 3.1 base score 4.3 (MEDIUM, Vendor/CNA).
Affected technology
Mattermost · 11.10.0 through 11.10.0, 11.7.0 through 11.7.9, 11.9.0 through 11.9.1, 11.8.0 through 11.8.5
Mattermost
Description’s affected range: versions 11.10.x <= 11.10.0
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required
What an attacker can do
Vendor/CNA’s CVSS 3.1 assessment (base score 4.3/10) rates confidentiality impact as low; integrity and availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.
- CWE
- CWE-863
- CCR priority
- 17.2 /100 (P5)
- CVSS 3.1
- 4.3 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N · Vendor/CNA
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-16 09:25:50.391882+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-18256.html