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Untriaged
Permalink CVE-2026-3116
4.9 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): High (H)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): None (N)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): High (H)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): None (N)
  • Modified Availability (MA): High (H)
created 5 months, 3 weeks ago Activity log
  • Created suggestion 5 months, 3 weeks ago
Improper Input Validation in Zoom Plugin Webhook Handler

Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589

References

Affected products

Mattermost
  • ==11.4.1
  • ==11.2.4
  • =<11.3.2
  • ==11.5.0
  • =<11.1.3
  • =<11.0.4
  • ==11.3.2
  • ==10.11.12
  • =<10.11.11

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Open source platform for secure collaboration across the entire software development lifecycle

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