CVE•Published 2026-09-14•Modified 2026-10-14•0 articles on news•4 live references•NVD data
CVE-2026-86348Mattermost · Mattermost_server
Vulnerability data via NVD (ingested)
CVSS v3.1
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS percentile
28
Exploit Prediction Scoring System · top 72% of all CVEs
Weaknesses (CWE)
Description
Mattermost versions <=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0 fail to recover from handler panics, which allows an authenticated user to crash the plugin via a post-action request with an unexpected field type.. Mattermost Advisory ID: MMSA-2026-00701
Timeline
Published 2026-09-14
Modified 2026-10-14
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-86348Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Mattermost Mattermost Server"All exposed Mattermost Mattermost Server instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Mattermost Server"HTTP body or banner mentions "Mattermost Server" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-86348Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-86348Censys host search filtered to this CVE id.
grep.app
CVE-2026-86348Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-86348GitHub code search for direct mentions.
Google dork
"CVE-2026-86348" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-86348 on GitHub.
We haven't classified any articles referencing CVE-2026-86348 yet. The external references above still apply.