CVE-2026-2456
Published: Mar 16, 2026
Modified: Mar 16, 2026
CVSS v3.1
5.3
Description
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 Mattermost fails to limit the size of responses from integration action endpoints, which allows an authenticated attacker to cause server memory exhaustion and denial of service via a malicious integration server that returns an arbitrarily large response when a user clicks an interactive message button.. Mattermost Advisory ID: MMSA-2026-00571
| Vendor | Product | Versions |
|---|---|---|
Mattermost | Mattermost | affected 11.3.0 - <= 11.3.0affected 11.2.0 - <= 11.2.2affected 10.11.0 - <= 10.11.10unaffected 11.4.0unaffected 11.3.1+2 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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