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Vulnerabilities

CVE-2026-2456 | BDVDB-2026-320691 Detail

MattermostMattermost

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

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

  • CWE-789 Memory Allocation with Excessive Size Value

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.