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The vulnerability of the Mattermost instant messaging application, related to uncontrolled resource consumption, allows a hacker to redirect users to any arbitrary URL address.
🗓️ 13 May 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 6 Views
| Reporter | Title | Published | Views | Family All 23 |
|---|---|---|---|---|
 | CVE-2026-2457 | 16 Mar 202611:20 | – | attackerkb |
 | CVE-2026-2457 | 16 Feb 202600:00 | – | circl |
 | Mattermost 安全漏洞 | 16 Mar 202600:00 | – | cnnvd |
 | CVE-2026-2457 | 16 Mar 202611:20 | – | cve |
 | CVE-2026-2457 WebSocket Message Spoofing via Permalink Embed Manipulation | 16 Mar 202611:20 | – | cvelist |
 | EUVD-2026-12407 | 16 Mar 202615:30 | – | euvd |
 | Mattermost allows attackers to spoof permalink embeds | 16 Mar 202615:30 | – | github |
 | CVE-2026-2457 | 16 Mar 202614:19 | – | nvd |
 | CVE-2026-2457 WebSocket Message Spoofing via Permalink Embed Manipulation | 16 Mar 202611:20 | – | osv |
| GHSA-PH22-FW5M-W2Q9 Mattermost allows attackers to spoof permalink embeds | 16 Mar 202615:30 | – | osv |
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Node
OR
| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
| web | www.web.nvd.nist.gov/view/vuln/detail |
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13 May 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 24
CVSS 34.3
EPSS0.00107