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Untriaged
Permalink CVE-2026-2456
5.3 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): HIGH
  • Privileges required (PR): NONE
  • User interaction (UI): REQUIRED
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): NONE
  • Availability impact (A): HIGH
created 6 days, 20 hours ago
Denial of Service via Unbounded Memory Allocation in Integration Actions

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

References

Affected products

Mattermost
  • =<11.2.2
  • ==11.3.1
  • ==10.11.11
  • =<10.11.10
  • ==11.2.3
  • =<11.3.0
  • ==11.4.0

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