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
INFO
Published Date :
2026-03-16T11:06:44.920Z
Last Modified :
2026-03-16T13:49:58.650Z
Source :
Mattermost
AFFECTED PRODUCTS
The following products are affected by CVE-2026-2456 vulnerability.
| Vendors | Products |
|---|---|
| Mattermost |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-2456.
| URL | Resource |
|---|---|
| https://mattermost.com/security-updates |
|
CVSS Vulnerability Scoring System
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact