Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check public/private permissions which allows members without these permissions to access public playbooks via /get.. Mattermost Advisory ID: MMSA-2026-00591
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
⚡ New CVE Alert: CVE-2026-6343 📊 Severity: 4.3 🚨 Risk Level: Medium 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-6343 #CVE-2026-6343 #CVE #Medium #CyberSecurity #InfoSec https://t.co/8K9A5Tgf7J
Post summary
The post announces the new CVE-2026-6343 with a medium severity rating of 4.3, lacking further technical, exploit, or mitigation details.
CVE-2026-6343 Unauthorized Public Playbook Access in Mattermost via Permission Bypass https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-6343
Post summary
A new Mattermost vulnerability (CVE-2026-6343) allowing unauthorized playbook access through a permission bypass has been publicly referenced via a link to a vulnerability detail page.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mattermost | mattermost_server | - | - | - |