PT-2026-25678 · Mattermost · Mattermost

CVE-2026-2456

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Publicado

2026-02-13

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Atualizado

2026-07-30

CVSS v2.0

6.8

Média

VetorAV:N/AC:L/Au:S/C:N/I:N/A:C
Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.0 through 10.11.10 Mattermost versions 11.2.0 through 11.2.2 Mattermost versions 11.3.0 through 11.3.0
Description Mattermost does not limit the size of responses from integration action endpoints. This allows an authenticated attacker to cause server memory exhaustion and a denial of service. The attack involves a malicious integration server returning an arbitrarily large response when a user clicks an interactive message button. The affected API endpoint is the integration action endpoint. The response parameter from the integration server is the vulnerable component.
Recommendations Mattermost versions 10.11.0 through 10.11.10 should be updated. Mattermost versions 11.2.0 through 11.2.2 should be updated. Mattermost version 11.3.0 should be updated.

Exploit

Correção

DoS

Resource Exhaustion

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Enumeração de Fraquezas

CWE-789CWE-400

Identificadores relacionados

BDU:2026-06565
CVE-2026-2456
GHSA-34G8-9FPP-46CH
GO-2026-4726
OPENSUSE-SU-2026:21483-1
SUSE-SU-2026:1135-1

Produtos afetados

Mattermost