CVE-2026-26233

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to rate limit login requests which allows unauthenticated remote attackers to cause denial of service (server crash and restart) via HTTP/2 single packet attack with 100+ parallel login requests.. Mattermost Advisory ID: MMSA-2025-00566

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

No affected versions have been published.

Timeline

Published
Mar 25, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-262348.8JUNG Smart Visu Server 1.1.1050 contains a request header manipulation vulnerability that allows unauthenticated attackers to override requeCVE-2026-262357.5JUNG Smart Visu Server 1.1.1050 contains a denial of service vulnerability that allows unauthenticated attackers to remotely shutdown or rebCVE-2026-262367.5A missing authorization vulnerability has been reported to affect QuMagie. The remote attackers can then exploit the vulnerability to accessCVE-2026-262377.5A missing authorization vulnerability has been reported to affect QuMagie. The remote attackers can then exploit the vulnerability to accessCVE-2026-262398.1A buffer overflow vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploitCVE-2026-26249.8Missing Authentication for Critical Function vulnerability in ePati Cyber ​​Security Technologies Inc. Antikor Next Generation Firewall (NGFCVE-2026-262409.1A buffer overflow vulnerability has been reported to affect File Station 5. The remote attackers can then exploit the vulnerability to modifCVE-2026-262419.1A buffer overflow vulnerability has been reported to affect File Station 5. The remote attackers can then exploit the vulnerability to modifCVE-2026-262437.2A path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit tCVE-2026-262448.8A SQL injection vulnerability has been reported to affect Video Station. If a remote attacker gains a user account, they can then exploit thCVE-2026-262458.8A SQL injection vulnerability has been reported to affect Video Station. If a remote attacker gains a user account, they can then exploit thCVE-2026-262464.3Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to bound memory allocation when processing PSD image files
CVE-2026-26233: Medium severity, CVSS 6.5 | Vulnix