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 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private channels and direct messages they do not have access to via a crafted request to the post rewrite endpoint.. Mattermost Advisory ID: MMSA-2026-00645
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-2026-5163 📊 Severity: 6.5 🚨 Risk Level: Medium 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-5163 #CVE-2026-5163 #CVE #Medium #CyberSecurity #InfoSec https://t.co/gLffbq8ydb
Post summary
The tweet announces CVE‑2026‑5163 with a medium severity level and links to NVD, but provides no technical details, exploitation evidence, or mitigation information.
CVE-2026-5163 Unauthorized Private Channel Access via AI Message Rewrite... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-5163 Don't wait vulnerability scanning results: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=2
Post summary
The tweet merely references CVE-2026-5163 via a link to a vulnerability database, offering no technical, exploit, or mitigation details.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | mattermost | mattermost_server | - | - | - |